why useless? his mystery can immobile another healer.

well dodger can be handy in this matter for shark bomb.

or kurenai passive for counter chaos.

an for double healers,its hard to tell who's you are reffering to, since healer like normal kabuto or normal sakura or shizune which are not matter at all.but for A++ im assuming that's sailor sakura with water main. then mostly they will use poison attack not the experiment talent. so which cancer water type that you are reffering? its the poisons or the chaos.if they use han with water main and sailor sakura than mostly they will go with poison type, which mean the main its self are not on pos 1 majority, maybe on pos 2. so there are no reason for ur pos1 cant lock her down and canceling the shark bomb with acupunture/immobile in build pos 1 mystery or from ur line up chases.unless... your bp gap are too wide.hope that clearing thing a bit.

Tips, have either ninjas that are immune and/or those that can generate chakra.

Also, people cant use pakkun twice. So dodge ninjas are still just as useful considering most chakra bomb teams have the bomb as the only source of damage.

Also, Killer Bee Mystery has it so that the target's mystery is not interruptable, so if you put it on a ninja that is immune, its mystery will always go off.

This is incorrect. You can interrupt an immune ninja in this way, but not an immune ninja with Bee's protection from interruption. You would need to use Kushina or Fire Main's third mystery to surpress immunity in order to interrupt.

if the ninja is immune and has been buffed by bee's interruption immunity he wont get interrupted.