Couple BLM questions!

[ChickensEvil]

OK just for kicks here are the stats on each one (fixed):

Thunder:
Cast Time 2.5
Potency 30
DoT Potency 35
Duration 18s
Proc Potency 240

Thunder 2:
Cast Time 3
Potency 50
DoT Potency 35
Duration 21s
Proc Potency 295

Thunder 3:
Cast Time 3.5
Potency 60
DoT Potency 35
Duration 24s
Proc Potency 340

(Removed the rest of the information because I had wrong calculations... Will need to recalculate the numbers when I can actually get into the game... unless someone else has already done this and can show how it affects things.)