the only defensive super cant stand up to any offensive super. that makes it not defensive at all. more like an aim here ability. the only time bubble does well is if the whole other team has no super. having said that, it does have the longest duration by far. but walking in and grenading it kinda defeats the purpose of a defensive super again. even with over shields, the bubble wont protect you from any other ability. so its not really defensive, just kinda dismissive