USE YOUR WALL! It blocks fatal attacks, (Terminus ult, skye ult, ruckus ult, willow seed, BK grumpy, etc...) Most healers need line of sight to heal. block vision from a single target with your wall and burst them down before their healer can react
Your ult goes through shields. against a double shield tank on point this makes their longest cd's worthless. It also goes through terminus' absorb shield. Stunning up both tanks on point and blowing their 15 sec cd's is huge.
Death and taxis talent completely denies Buck's healing and saves you 1800 credits and you can easily out DPS him which makes him a free pick
and you don't have damage falloff so you can take advantage of that and fight him from long range
koga players just run around holding r2 or Lmb the entire game, so you take androxus, use 1 or 2 nether steps to go in, use defiance, use reversal, then turn and use nether step. If you have godslayer you should deal around 2200 damage.