Igynis worm experience bonanza
Not sure if I spelled it right but its those fire worms. Stacks are classed as strong or deadly but are extremely easy kills for a weak stack. I can send my Sovereign in alone classed as weak for an experience point bonanza picking up 1-2 levels for an easy kill. In contrast a weak bear or black widow stack is a much harder prospect for my weak Sovereign stack often killing it. The damage from the Igynis worms looks very low so maybe something is not working?