Maybe you skilled a masterie that brings your team out of the right turnorder, like Rapid Response (support tree).

Yes, and u should take a look in the calculator, speed sets grant u % bonus so there are no round numbers so maybe a liitle difference there can be the problem too.

changed a few masteries now, also someone from my clan just told me that the one that takes the stun should have the most hp and least defence, until now i was sure that its supposed to be least hp and no meaning to defence... so im working on making the tower with less hp and more defence(and the opposite for frozen banshee that should take the stuns)

thanks for answering!!

ill be happy to get any other advices will be great :)

I see that but i didnt mentioned because i use the regular ME + PK setup.

CB will try to kill the squishy one so your stun target must have the highest HP (not much more, just more thant the others), and less defense than the others.

Must have a little sustain before he recibes the stun. Otherwhise, with 1 HP remaining boss IA consider this champion "dead" and go for other target.

The important thing is, just before the stun... your stun target must have less % HP remaining than the others. No matter if this is higher amount of HP, if this number represent a minor % remaining, boss will try to finish him anyway.

I saw that but i didnt mentioned because i use the regular ME + PK setup.

CB will try to kill the squishy one so your stun target must have the highest HP (not much more, just more thant the others), and less defense than the others.

Must have a little sustain before he recibes the stun. Otherwhise, with 1 HP remaining boss IA consider this champion "dead" and go for other target.

The important thing is, just before the stun... your stun target must have less % HP remaining than the others. No matter if this is higher amount of HP, if this number represent a minor % remaining, boss will try to finish him anyway.