full speed and def or hp

Because eva doesn't really work on PvE bosses with high accuracy which makes eva kinda ineffective. If you're into PvP then eva maybe a good option but then again Warbow class will RiP your eva if you ever face them

Just as per LostWanderer said, so... try get above 50% def or cap it if you can first... get some +hp + -dmg secret stone while at it.

also brawler and duelist mostly use eva as main
even in pve, eva does wonder for them and eva useless for other class

and by capping def i don't mean by adding stats, they make armors +X where x is usually above 15 and above then they pump eva

reason melee use eva is cos they are stuck to boss / players