What works for me is: skull sunder "canceled" into bloodbath/convalescence/bloodbath (add 1/2/3 respectivily).

I think the bigger advantage when picking them up is target them as soon as you see the circle. Due to latency in this game, stuff spawns a fraction of a second earlier than you can see them. I've got a "nearest target" button, so this works awesomely for me.

Another one I've heard and tried (I don't like it, but it does work): steel cyclone. I'd cancel it the same way I explained earlier.

By the way, check if your healer is casting anything after giga/rage hits. There is enough time for medica II after you pick up the add. Healers should be on OT/MT since they get massive dmg. The group can be dealth with a few seconds later.

Try it out