Playing worms as though they are a standard BG with standard champs is gonna net a lot of losses. Necrosis champs suck. They suck real bad. Trying to make them work is going to be an exercise in frustration. But, I do think they can win, so long as the BG plays to their strengths: playing a long lock-down game, using their deployment zone for BS positioning, and cheap - if strange - utility. The common/uncommon worms have a surprising amount of natural synergy with Necrosis. Also, run Reaper's Blade. It's a wonder with the new Forage Dusk Creeper, and that plus Essence Drain is a wonder of a gimp.