Tank Swaps how to do it right?

[Remn]

I didn't know that spiny pre picks a target. That's why it seems like I already lost it when it spawns. If everyone would run to B when this happens they should be close enough for my tomahawks I think.

I can get chirada with the oteviously mentioned bb finish but that hate is lost while fishing for spiny.
Not to mention the crazy slipstream risk at this point as it won't be my focus anymore and I probably should try to face it away from area B.

There are many things that need to happen perfectly for all this.

Here is how my group use to do it back when it first came out. (IMHO, it a lot more simple)
When sister and Spiny pop, OT grab one of the sister (Chi or Sub) then let the spiny goes to whoever and leave it there.
OT keep an eye on Person w/ spiny and Provoke it of that person when he has 2 stack. <--(at this point OT add should be dead or he should has high enough hate.)
This strat will depend on MT tanking both boss and sister and Healer to SS and Adlu MT when Garuda and sister use WW/Downburst combo.