Should I chop the severely damaged side shoot or keep pushing for recovery?

if it's healed, it'll be fine at this point... do better with splinting or otherwise taping it back together and shouldn't have any issues next time.. I'd judge it by current growth and do what you think is best. If it's growing fine 'today' just leave it. Maybe don't top that one again and let it catch up to others if you top them etc... kinda depends on context as to how to handle it. if it fucks with your training plans, cut it off... no biggie.. worst thing is that it slows you down slightly in vege. i would keep an eye out for hermied on this plant.. not a huge concern, but anytime i split a stem it seems to be a higher probability. could be wrong on that. i have specific goals for number of colas per plant. so when this happens to me I do whatever is best to keep up with the rest of the canopy. If that means 1 or 2 fewer colas, so be it. I can't negatively impact 7 other plants for the sake of 1. Context will dictate what you do.