The -70 resists is quite a pain especially with souls and lightning enchanted.
Since Infinity breaks the immunity, would like advise if sunder is still necessary?
That’s probably more a judgement call thing. Personally I always thought of the lightning sunder charm as a double edged sword.
If you’re able to break the immunity without a sunder charm, then using a sunder charm may speed up their kill speed but also them killing you, but also will slow down your killing speed vs non-immunes as well.
Ive also found the Sunders as too risky… now it sits in my stash