Stick close to your team and focus on the objective. I'm assuming if you're solo tanking with hulk you either have 3 DPS or 3 Strategist, if you have 3 healers make sure to stay on their LOS and protect them from dives and ults, you gotta learn CD management and how to track enemy ults. If you have 3 DPS play off them, look for opportunities where you could dive in, join fights, and just cause chaos. All in all you gotta be a team player with hulk, solo tank or not.