It would be better if you explained the problem before proposing a solution, otherwise people will trash your idea because they did not understand what it is you are trying to achieve.
Personally i don't think poisons are a problem with groups - they usually don't bother, they just charge up their eyes of the storm and negates, then streak thru negated opposition and wipe them all out at once in 2 seconds. Poisons are a non-factor in such a scenario.