Oh wait wait my post was more aggresive than i tought

I was just opposed to the single target whm advantages
Whm is hands down the best aoe healing (range, raw power, everything)

I don't think whm has a better mp management than AST...
I mean AST has a double mana regen that can be both extended by 5 sec and if lucky with card drawing one EVERY 30 sec (but lowering support bonus)
Assize is an awesome tool i agree (i love that spell... So much spiritbonding...)

Free cure is good... Damn good but you have to cast it XD
I prefer the instant benefic II (but it cost a lot.... Urgh)

...

Divine seal does not affect tetra nor assize nor asilum... If i'm not mistaken...
And synastry give a less stronger bonus buff but a superior healing in the end (string 2 target healing or 160% single target)

...

As for the card...
Balance is the best for DPS...
Arrow could give à stronger boost but require a better ressource management from the DPS
=> arrow enhanced the risk of enochian failure on Blm XD because they will be greedy for more and forget to recharge Enoch with ice 4