I want share my experience with artifacts reforge and which artifacts are useful.

Basics about artifacts

For the range heroes you have to focus on the artifacts with special skill and for the meele heroes withr HP or DPS. Artifacts with two slots gives the most bonus for special skill or DPS and one slot artifacts for HP. So i prefer to focus at this artifacts.

There are many two slot artifacts with different base stats. For all range heroes you want items with a higher special skill. For example:

r/RaidHeroesTotalWar - green artifact
green artifact

This artifact is useful without reforge and with reforge to yellow it gets 200% bonus for special skill. That is the maximum bonus for a level 5 artifact. Some example:

r/RaidHeroesTotalWar - yellow artifact
yellow artifact

Reforge

But there are two slot items with DPS at main stat:

r/RaidHeroesTotalWar - green artifact with DPS as main
green artifact with DPS as main

This artifacts can be reforge to 200% DPS and 200% Special Skill as a red artifact:

r/RaidHeroesTotalWar - red artifact
red artifact

So every two slot item with DPS and special skill and be reforge to a level 200% DPS and 200% Special Skill item. This take a lot yellow and red gems, so first focus on useful artifacts with right stats.

HERO ARTIFACTS

Question: What are Artifacts and how can they be used?
Answer: Artifacts are items that your heroes can equip. The higher the rank of your hero, the more artifacts it can equip. Artifacts increases the stats of your heroes. You can also level them up using Purple Stars. You can increase their class to Uncommon by using Yellow Gems and then to Legendary using Red Gems. You also have the option to change it into another Artifact by Reforging it using Green Gems. It should be noted that using the above-mentioned gems has a percentage chance of success. You can increase the chance by using more gems.

Question: Can a hero wear the same kind of Artifact?
Answer: They can. Use the Change Artifact feature.
(Explained in the question below).

Question: Can you equip another hero’s Artifact?
Answer: You can. Select the hero and scroll down to find the artifact you want to swap. Click on the said Artifact then click Change. Look for the Artifact of that other hero and once again click Change.

Question: Why is it that I cannot wear an Artifact?
Answer: Some Artifacts are intended for certain classes of heroes. Also, it is required that you place these Artifacts on specific body parts of the heroes.



Artifact Enhancement Levels

HERO SKILLS EVOLUTION

On the tablet you see the skill level and the number of crystals needed for the evolution of one skill.



TRAPS

Question: How can I acquire Traps?
Answer: You need to unlock the Laboratory. The Laboratory produces Trap Cards every 720 minutes. You can also buy the said cards from the Trader. You need to collect the required amount of Trap Cards before you can use it.

Question: Where can Traps be used?
Answer: Traps can only be used to defend your Castle and Arena. You can only use 2 kinds of trap.

Question: How can I set a trap?
Answer: Select the trap you want to use. Place it like you would your heroes on the battlefield.

RAID

Question: Can I skip battle levels?
Answer: You can skip 10 battle levels using Portals. Portals can be obtained from the Magic Tower, Clan Chest, Daily Challenge, and Trader. You can only skip battle levels that you have previously completed.

Question: How will Portals help me?
Answer: When you Start a New Raid, it is no longer necessary to go through the same location multiple times. Portals are a must have when you are rushing to go to a specific battle level.

Question: What happens when you Start a New Raid?
Answer: The Raid Progress, Hero Stats, Coins, and the level of Gold Producing Buildings will reset. The Crystals, Purple Stars, Crystals, and the level of the other Buildings will remain as it is.

Question: Why do I have to Start a New Raid?
Answer: If you cannot progress because a battle level is too tough for you, you have the option to Start a New Raid. Starting a New Raid is good for finishing your Daily Quests, Collecting Hero Cards, Attacking Castles, and getting Purple Stars.

BLAZONS

Question: Why are Banners needed?
Answer: Banners increases the income from battles and buildings.
It also allows you to add a 10th hero to the Squad.
(The additional hero can only be deployed for attacks).
In total there are 3 Banners to choose from, which has its own bonus percentage for income gained. You can read the detailed information about each Banner’s quality by going to the Quest or Shop Tab, clicking Blazon, then selecting the Banner.
The banner of the Leader and Commander is valid for 24 hours while the Banner of the King is valid for 168 hours.

ARENA

...Question: What do different Leagues mean and how can I progress from one to the other?
Answer: League depends on points. The higher the League, the better the rewards in Arena Chest and the more Purple Stars the Arena Building in the Castle gives.

Question: How often do tournaments take place?
Answer: Tournaments are held once a week.

Question: When does the Tournament begin and end?
Answer: The tournament closes at 22:00 Moscow time on Sunday. The next tournament starts at 3:00 Moscow time on Monday.

Question: Why didn’t I get a reward for the tournament?
Answer: The script issues a reward within an hour after the end of the tournament. If no reward is received within an hour, please create a thread in the Forum so that the Developers can assist you.

Question: How are points distributed among the Leagues in the Arena?
Answer:

score <100 = BEGINNER
score <500 = 1 league
score <700 = 2 league
score <900 = 3 league
score <1100 = 4 league
score <1200 = 5 league
score <1400 = 6 league
score <1600 = 7 league
score <1800 = 8 league
score <2000 = 9 league
score <2200 = 10 league
2200+ = CHAMPIONS LEAGUE

NPC TRADER

Question: Who is the Trader?
Answer: The Trader is an NPC that occasionally appears on the Raid map and offers a diverse range of profitable offers (all offers are 30-50% more profitable than similar purchases in a regular store). The trader always has a free gift. He has a chance to give or sell you a banner. If you do not like the list of products he is selling, you can always change it by paying him Crystals.

Question: How often does the Trader appear?
Answer: He appears every 5 hours starting from the time you last saw him. He will then leave after 5 minutes.

Question: What should I if the Trader does not appear?
Answer: Battle in the Arena or fight in the Raid. These will trigger him to appear.

Question: What determines the prices of goods from the Trader?
Answer: Prices in gold are based on the exchange rate in the store and the battle level you are currently at in the Raid. The price payable with Crystals remains constant.

OTHER MATTERS

Question: The game does not load, what should I do?
Answer: Try to clear the cache and change the browser. If this does not help, send a screenshot of the error and post it on the Forum.

Question: I found an error, where should I go?
Answer: Post a thread in the Forum so that we can help you solve the problem.

Question: I saw a suspicious player. I think he is a cheater.
Answer: Inform us in the forum so that we can verify this information.

Question: Why am I not allowed to watch ads?
Answer: Advertisements is offered to social networks. We will show it as soon as such an offer appears.

Question: Can I reset my account and start over?
Answer: It is not possible at the moment.

Question: How are numeral abbreviations decoded?
Answer: The sequence is as follows (3 digits per letter):
1-999
K - x1000
M - x1000000
further by analogy: B, T, a, b, c, d, e, f, g, h, i, j, k, l, m, n