The problem is you will need a good amount of emblems to level them up and they are quite rare in afk arena thats the reason why i wanted. Here is the complete list of all signature items in afk arena.

Afk Arena Tier List Signature Items Source Tier List
Afk arena tier list signature items. Signature item attributes are calculated by multiplying a heros base attributes by the signature items buff percentage value. All legendary tier heroes do not have signature items. We only need to balance the hero tier list with lvl 123 signature items. Their signature item is an individual boost item only available for that hero and can for some heroes really boost their effectivity. It would be laughable to do a item tier list. The items themselves arent good or bad its their impact in the overall character gameplay that matters.
Signature items are enhanced by using various emblems. The stats and unique ability are upgraded through enhancement. These special items will increase their stats as well as grant them some. Heros base attribute hp atk etc x item buff value 10 20 etc bonus attribute. Once heroes reach the mythic tier there will be a new option unlocked on their gear screen on the bottom left. Every level up increases stat boosts by a fixed amount and every 10 level ups.
Once your heroes reach mythic tier in the ascension you will be able to unlock and level up their signature item. What are signature items. Once your heroes have reached the mythic tier you will be able to unlock their signature items. This is a tier list for signature items in afk arena. This slot is for signature items which give heroes bonus stats and a unique ability.