Honestly, I won't 3bet in that spot. He never folds on our shove as short as we are. Next hand we have to shove vs the chipleader, so we are in a tough spot. I will personally take a different approach here vs someone raising such a wide range. I will call on his raise with my low pairs 22-55 and ship any flop (well, obviously not 225 flop if we hold 22 or 55, but you get my point imo). We have 1ps bet and there is a greater chance he folds postflop. He is also a midstack, which actually gives us some decent FE postflop.
With K8s, I might take the same line. Folding is never a mistake though! If you want to push, you have to push only your value strong hands. You don't wanna be flipping here on the bubble. Some + chip EV decisions are extremely bad dollar EV ones as ICM tax is big here. So, if you think he folds postflop enough, go for stop and go. If you have a feeling he is very spewy, I will just muck my hand.
Shove 66+, A9+, KQ+ something like that imo. IF the CO is abusing the bubble by raising/shoving a lot and there is a spewy midstack, I will be even tighter.