just couple things smn needs a stay command so when useing favor the avatar can be kept in range of party without having be engaged on a mob or the smn standing in dmg range. Increase the duration of lot the buff bp so they closer to titans stoneskin time, like gardua blink/haste Diabolos Noctoshield/dreamshroud move some of fenrirs. Give carby a regenga bp and some avatar a regain bp or favor.
sch libra is currently useless in battle with a 1 min timer lower the recast to 3-5 sec and allow it to display hate list for whole alliance also maybe give info on mobs weaknesses/strengths like to elemental and dmg type. Also while in aby/Woe/void give random trigger hint to. Far spells increase the duration of weather effect spells to least 15-30 mins same for the enemity spells and bar spells to least 15 mins.
Sch add a trait that reduces recast time on light/dark arts based on the level. Also increase stratagems charges for 95.Could Also use a strong resist para trait
And of course C5 and a native mab trait for sch would be nice not mention have access to more cure potency/mab gear like roundel earring (what even comes from same expansion sch did) and Eradico Mitts Basically have same access to gear that other mage/mageish jobs do like smn/brd/rdm are even listed on cure potency/mab gear that sch cant wear...
Maybe even a transfer enmity jas that let it take enmity form other playesr and give enmity to another either the schs own enmity or a enmity store bank similar to Sublimation where it holds the built up enmity and then can give it to another player of chooseing.
Quick thing on bst could increase the dmg on tp moves lot the tp moves dont do any more dmg then regular hits some even hit for less the regular hits. Least this is how it is on any mob that matters as in anyhtign that thats higher then a dc/em mob