SR 20 is good.
For the sake of moving along, I'd be ok with removing the question marks on Treasure and Alignment.
These are probably copy-paste errors, but don't they get 6@17 for skills and 5 feats?
Let's max out Concentration, Know (religion), Know (the planes), Listen, Spellcraft, Spot. Sound good?
For feats, how about some Spell Focus and Spell Penetration, maybe metamagic?
Maybe next we could do the worrywart? It’s found in issue 294.
The Worry-Wart is in Dragon #259 not 294.
Do you fancy joining in the conversion or is this just a request? So far the CC only has the Skullcap Ivy converted from that issue's Symbiotes and Parasites article so we have three left to do.
If you and/or Freyar fancy working on those for the next Dragon Magazine monsters I'm game.
There are plenty of other choices though. I have a bunch of creatures from the original Dragon #89 Creature Catalog as well as Dragon #111 Creature Catalog III, Dragon #238 Spawn of the Sewers, Dragon #265 Earthstokers, Dragon #238 Dungeon Monsters, Dragon Annual #2 Arctic Monsters and Dragon Annual #3 Urban Monsters on my Want List.
It’s a request

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.