Freeze Transpose Flare Flare Transpose Freeze HThunderII/Foul repeat.

You dont use HB2 to regen MP, the 2500mp from Umbral Ice I is enough to get MP for two Flares.

You don't use HB2 for damage or even stance swapping anymore.
In fact you don't use any form of Fire II or Blizzard II at all now. The potency got reverted to a state where they do less damage than Transposing in and out.

Welcome to to your scheduled "ruin BLM on expansion launch, Endwalker was just a huge gaslighting joke".