I'll admit that parts true if you use the recharging shield perk, you're practically invinsible, shotguns need 2-3 shots but still it isn't op because 1, if you just don't go into his bubble you won't die, and 2 of course you need to be stronger, it's a super after all, if you could run in and kill a titan in a bubble then whats the point if the titan isn't even able to get kills like every other super allows

Haha, no. Titans sit inside their bubble of ass-blam!- with shotguns and kill you as soon as you get inside.