I was going to test out prismatic ray as a single spell dps rotation
2.5 sec CD > 2 second with 20% CDR (SD + Draconic + EA) because I want application tick right after 2 sec regular dot tick.
I think due to having fire and lightning and acid damage it counts independent caster levels, spell power, crit, multiplier for each, making it a chaos, air, earth, fire spell. So I think it may spell power scale magma and acid attunement, as well as launch all their other related procs.
41 AP Fire (immolation + bypass) (15% fire vulnerability)
21 Air (vulnerability) (20% all vulnerability)
18 Wild Mage (chaos + stuffs)
Main/offhand Ash/Ooze -31 MRR
SD Tier 4 darkness debuff and shadow loss -14 PRR/MRR
EA Turn undead -5 PRR/MRR
+2 arcane lvl item
If it is a chaos, air, earth, fire spell, should get 30d6 Chaos on hit, 20d6 fire on hit and dot, 500 dripping with magma on hit and dot, 250 acid attunement on 50% hit and dot %, draconic 37(d6+6) on 1/3 hits and dots, plus base spell (avg 15(d6+7)), plus wild mage random stuffs.
3 spells every 6 seconds will give 90d6 Chaos, 120d6 fire, 3000 magma, 1125 acid, 148(d6+6) draconic, 45(d6+7) base spell plus wild mage random stuffs => around 900 base spell damage/sec *10 (spell power) * 2 (crit) * 2 (debuffs) = 40k dps plus wild mage random stuffs.
I think the math would work out, not sure if mechanics do. Draconic fire savant has enough AoE, this is to just touch up the single target rotation to a single button that is "good enough".