Affixes like push the limit, barbarian and glasscannon boosts your dmage whether it is primary or secondary. For now you can remove all ed+ in to set affixes like (frozen, crsuhing flames, demonic, electrcution). These affixes give boost to your dmage and helps u clear floors quick and efficiently. You can put skilled/brutal mythic in ur chest since u have high attack speed and uses primary skill as your kit. Put also fury resource mythic in exchange for resource affix and mp on hit. Also use stealth as your special oh skill for ur survivability. Keep crit dmge, attack speed and luck(crystal affix). You can put crushing blow and crit chnce(crystal affix) as an addition to ur gear.
If u want to farm on 3k floor and above, u should disregard health since u will only be one shotted by mobs no matter how high ur hp,armor and resist u have. So u should invest on dodge,block, ms speed(clearing floors fast). Combined with farming affixes like luck,gold find,item drop rate and set affixes like crystalline and eternalized.
I mentioned taunt because thats the skill i use. I only have one char in each of my device (tablet and phone). So in order for me to maximize farming on higher floors, i disregarded dmge boosting affxes and replace it with farming affixes and rely on crushing flames and frozen. I am using taunt(ice element) + skill (fire) as my strategy in farming on higher floors.
Well farming on 1k floor and above is useless as u can obtain high tier crystal starting from 500. And u can now craft itemst that are found on 1k flr and above. So its up to u.