I played a game with a team where 2 of my team mates had voltaic tempest. So we wiped all of the other players and then those 2 team mates just spamed the bombs at the entrace of their spawn point, they couldn't even get out and the ones who risked it got anihilated.
What i'm trying to say is that you will probably get a lot of complaints about bombs being waayyy too overpowered. I do realise that if a guardian protects you you don't get hit, but guardian shields break too fast when it comes to shielding bombs.
"guardian shields break too fast when it comes to shielding bombs"
This could possibly be the solution to this problem - let guardian shields absorb slightly more dmg vs bombs, enough to allow your team to make an assault on the bombers camping.