In general, if they're gonna stick with not letting T2s apply to multi-hits, they need to at least always be 2x stronger than the T1s. The real issue with T2s, however, is that their accuracy is determined on-strike as opposed to on-cast like with T1s (which got adjusted to pander to SCHs using Accession). The secondary -resist effect is pretty laughable and I've never been a fan of how they chose the elemental correlations. Enblizzard II should lower Ice resist, not Fire. Otherwise, -10 of an elemental resist doesn't really change anything on mobs of difficulty, especially since it can't bypass immunities if used alongside Death Blossom.