BLM is arguably the only job that mana actually does have a meaning as high level optimisation of the rotation actually involves playing with mana ticks to maximise uptime (such as a very simple example of transpose fire 3 procs needing good umbral ice ticks)

The standard line never cares about mana (outside of when to use manafont but 999/1000 times you just use it for a second fire 4/despair) but a lot of optimisation does care

Every other job it’s either self regulating or really only regulating excessive rezzing