Between McM, some other incidental models, Rafkin or Seb, plus two nurses obeying them to drop even more shockwaves on turn 1, I've been able to get 14-21 poison on whatever models I want to stand close together at the start of the turn. Susceptible to early blasts, takes a ridiculous amount of card flips that takes a fair bit of time and tracking, is hilarious, gives a ridiculous end of turn heal and causes your opponent to focus on one model at a time and kill it completely. Kentauroi help move the models forward a bit after all the standing around. You get distract on the obeyed model, but shockwaves don't care and you can deal with it.
Whether it's worthwhile or not is up to your playstyle, I suppose. Experimental is the crew where I wish I liked the playstyle more than I do, so I can't really speak to effectiveness.