All PBAEs should have the same delve. Only the damage type is what's making them different (besides the optical effects...).
What you need to look at is what other utility do the PBAE casters get (always based on 50 into the PBAE-line).
Wizzard gets:
A snare-dd, debuff-dd (10%) and an aoe-debuff-dd (also 10%).
Secondary skill lines give him either better bolts (both lines), low level GTAE and some low level dots (earh) or low lvl nukes (fire).
Enchanter gets:
A pet, a damage shield, heat/matter/cold debuffs.
Secondary skill lines give him a lower nuking variance for his heat (yeah, he can debuff it himself...) baseline nuke and some extra debuffs (in the sun line). Also don't forget the baseline stun in hib. The enchantment-line is propably the least used one... The enchantment line only gives you some pet buffs so it's not really woth it imho.
Spiritmaster:
A pet (that intercepts for you vs. melee attacks!) heal, mezz, demezz, combat Speed and a nice aoe str/con debuff.
Secondary skill lines give him either various pet buffs (again: not that useful imho) but make sure to get at least the very first dmg shield for the pet (see below for why) or a bunch of debuffs, more mezz and a low lvl lifetap. Can also debuff dmg types but not for himself.
Druids/shamans can put better buffs on your pet for pve than you could with the remaining points.
This is one of the points in game where the extra class in Alb shows what it leads to: Not being bad but both other realms having better options (imho). Alb has other very strong classes tho so go figure
If one of your aspects is pve then Hib comes out on top (again: imho) because you can use your pet with the very strong focus shield to pull some mobs to you and then PBAE them. Mid can to that too but with a lower dmg shield that draws less aggro to the pet while pulling.
For rvr: Hib stun + debuff + baseline-nuke is amazing. The mid Utility with the demezz (!) and a backup mezzer + emergency healer isn't bad either but does not match the pure damage the enchanter can dish out - even by himself.
jm2c