When you rework khazix
In my honest opinion
is one of the healthiest assassins in the game right now. He isn't even decent in teamfights unless you manage to split a squishy from the group or as mop up at the end of the fight. His power spikes are currently pretty heavily gated at levels 6 and 11 when he gets his ult evolutions. The only thing I wish was that it was worth it to consider evolving his w and r before his e. The e at 11 is good even if you feed your ass off in laning phase because it gives you a good escape and the chance to execute an enemy or 2 to get back in the game. If his w upgraded had much better wave clear or his ult upgrade was increased in duration by something like .5 sec I think those would make them viable.