I no longer use the patch on the groud after the blue bar is empty. Just the Imob...that keeps the bar empty and I only get shot at infrequently after I have them. Of course they don't get woken up until the imob fades and I reapply.
My Elec Dominator shuts down most groups to pathetic levels. I take them out one by one using the elec patch and the aoe imob. Single targeting down one at a time.