*WITH NEW UPDATE, THIS TRICK IS DEAD :'( , THE GOOD WAY TO KILL KARN IS USING FIXER.. FOR NOW
just my 4th time with Karn XD, finally got 100% damage
setup : agent always with tactician safeguard
gear :
doombringer (totally optional)
2 magic gear (I use sign post and mystic)
cube (for evasion)
heroes : Nul and Dr Strange with his specific phasing a-iso on his 4th skill
strategy :
just give Karn Meteor Swarm (MS), it dealt 20k damage per stack, maximize the stack by using magic attack with maximum 5 stack
after you give Karn MS, use Dr Strange 4th skill (shield of whatever) to give Nul Phased so Karn won't hit him for 2 round (Nul must not doing any action except 3rd skill and recharge)
after applying the second MS (2 round), don't use Nul 3rd skill because the pre-counter can make Karn flee the battle
I'm using Doombringer to lower Karn status so His attack won't deal much damage to me
too bad Strange died in this video :'(
Deathlok for my next video maybe ????