Brute ... nice look at updating Champion , could tie the 7 ability to the +proficiency dX scale , as is it's weaker than the Pal 6 aura , but still useful.
2 Halo in isolation is OK-ish, you probably want some other Reaction
2 Symbiotic Entity makes Halo > Hellish Rebuke , temp HP < Moon wildshape , + poison damage is most resisted , I suppose a dumpster dive could line-by-line the relative value to Moon forms
6 can only attack not move , which is nearly useless , and Animate Dead is right there , ability needs work
10 more useful than Halo without SE , plan tactics with Thorn Whip or Lock EB push or lock-down frontliner
14 prelude to the various 3.5e Prestige classes that change type
Invention = big pile o' fun
2 don't pick those spells known , make a scroll of each , write scroll into spellbook = way waayyy more spells known than normal , especially 3rd levels and higher. Love it.
6 no need to dip Paladin anymore, everybody hates roleplaying the tortured demigod I win the game but my code of conduct makes me feel guilty in weird ways , Oh Thor ?!
10 slippery slope into 3.5e Erudite Spell to Power (same way
Archeron Gehenna (oops) is a longer and steeper slippery slope , but Arcanaloths like to tempt folks with that sort of powah)
14 this is actually very tricky , you'd want to lead with one of these EVERY encounter , and then adapt around the random initial conditions , doubtful this gets used (high c.o.) more often than the first round , and maybe Not used in the later part of the day , cause Wiz has more than enough oomph , to risk a nearly wasted action to start a combat
verdict : Don't take away my SUNSHINE