Max it.

Maxing is now more beneficial with Sunder.

Past level 30ish will still do no help to non-cold immunes. But cold immunes are now broken with sunder and you’ll be able to get max benefit from cold mastery.

Thanks for the response guys.

Much appreciated.

Another question, what about Sunder Lightning Sorc.. What would be the best weapon when paired with Infinity + Griffon + Sunder Charms ? I hear ppl say Crescent Moon, but I'm not entirely sure.

Thoughts?

That’s a great question, that I cannot answer. I’ve heard someone say that light sunder is not needed when using infinity. And if you don’t have infinity, you would be better off going cold or fire. -light res & infinity are only partially effective vs naturally immune but sunder broken monsters.

But my guess would be cmoon for pure damage. fcr and resists are always needed, so hoto or eschuta a strong contender.