Buff Blizzard 2 for BLM

[sakraycore]

lol. Blizzard 2 once was 100 potency. it was dropped way back I think around 2.1 or 2.2. People use to spam it in FATES and it's a cross class skill to summoner and scholar so we wouldn't want them to bane dots followed by spamming blizz 2 for 100 potency instead of ruin for 80.

Simple fix: let THM/BLM keep the original version.