This isn't even true. I killed Titan yesterday, with 7/8 ppl dead and 2nd Superbombs already on screen. I got Windbite off and was killed, and the BLM Scathe'd Titan to death. He then got killed by superbomb. We got the clear.

Also, to agree with everyone else. You shouldn't even see 2nd Superbombs, and unless your DPS is stupid low, you should always ignore 2nd Superbombs.