Easiest way to locate spells is through this link:
https://everquest.allakhazam.com/db/spelllist.html Search for Enchanter spells, level 16 only. The only one I can think of that is really a "must have" though would be mesmerization (I think that's what the first one is called). It is research only, but you should be able to find a copy in the bazaar. If not, get your research skill up a little bit and buy Tasarin's Grimoire page 26. You need both the left and the right half of the page.
This spell is useful on mobs up to level 55, so you'll get a lot of use out of it depending on your playstyle.
Oh, the 16 pet you will need to get in Highpass Keep. All of the enchanter pet spells from 8 through 49 can be bought there.
Hope this helps a little :)