I mainly use Kabbalist because of the SP Regen I can get through Ein Sof, makes it so I don’t need to waste money on SP potions and I can also use it for team mates, other than that, it doesn’t offer much.
PD on the other hand has healing factor and cc inmunity stuff, won’t deal as much dmg with Incineration I believe since we’re either full STR or some CON and rest into STR, healing factor provides a really comfortable questing time.
Overall it’s just pretty much up to your preference, Kabbalist is only for convenience while PD can provide more ways to protect allies overall, I personally so far prefer Kabbalist because my combination of classes has really high mana consumption and with Ein Sof I don’t have to use sp pots on CD.
Another option for R7 is Oracle which has Prophecy and Counter Spell to work as your cc dispellers and being inmune to Magic DMG for 30 segs basically.
I might try out with Oracle or PD with the resets on these few days, but so far Kabbalist appeals the most to be (or Oracle at 2nd, PD at last, the only thing I like about PD personally is Healing Factor, nothing else).