SCH (1 generator cast at 60s time), AST (2 charges, 30s each), and SGE (3 charges, 20s each) can get up to 60s of resource out of combat. WHM is "unique".

...I don't see the issue here. We did say "unique", did we not? Being unique is good and sufficient, no? /s


In all honesty, though, that's among the least of my concerns surrounding WHM. I'd like to be able to enter with a charge... but beyond that, I don't much care, as it frequently takes a minute before I have opportunity/need to cast a GCD heal anyways.