I believe with the flare changes the current distribution is
PCT (using no holy’s)>BLM>RDM>PCT (using holy every time you get it)>SMN
BLM was slightly ahead of PCT (who was about 15-20 seconds ahead of RDM in per 2 minute casts) before flare and the return of ice paradox but because of flares long cast time and ice paradox BLM has fallen behind
It’s still by far the caster that suffers the most from getting caught out without movement abilities (while it barely affects PCT at all)