couple things from your first post, mending halation is a healing JA, so it does have that as a backup option, though it's on a 5 min CD. the SJ you choose is heavily dependent on the content you're doing and if you have access to trusts. /sch does lose the haste, but you can offset that with an indi haste.we utilize /sch for sortie because it gives additional strats, sublimation, and the arts fast cast bonus. /rdm gives 15%, /sch gives 10%. /rdm does go up to 20% when you're ml 30 and higher, so that's worth knowing. as for direct cures, rdm has cure 4 right out of the gate, where sch needs to be sj 55, so again, ml 30.
if you want a side by side spell co9mparison
rdm- gravity, haste, refresh, cure 4, distract, frazzle, raise, pro3/shell2(3 at ml 35),dispel
sch cure 3 (4 at ml 30), sublimation, pro 2 (3 at ml 5), shell 2, reraise and raise, helixes, weather, dispel, regen 2, (3 at ml 50)
the biggest difference really comes down to the haste and whether you like refresh or sublimation for yourself. frazzle and distract may be helpful too, and the offset is weather/helixes and klimaform and regen(though fairly weak)