That's possible. The question is, do you want mesmerist X / psychic 1 (dipping for the phrenic pool) or mesmerist 1 / psychic X (dipping for the hypnotic stare & better armor/weapons)? Straight mesmerist or psychic should work fine too.
If you're talking about boons this must be for PFS and there's limits on how much of a Bad Guy you can be as I understand it.
I think a mesmerist has about the best spell list for what you describe anyway, and without a sensible reading of the mystic past life trait (impossible in PFS) it's useless to psychic casters. Go with a human.
If anything, you probably want to play a Kitsune (as they have an alternate racial trait for enchantment spells) and dip a level of sorcerer for fey bloodline. It will make your DCs extraordinarily high.
I wouldn't recommend dips as full casters it's the sort of thing you will come to regret. May look nice as a build but going so long with weak spells can be annoying. You want level 4 as soon as possible. More levels in Psychic will mean higher levels spells with higher DC's, better affects and more points to put in the class ability that increases save DC's for mind affects. It will also mean you will have access to other control or buff spells for when enchantments just won't do, haste, black tentacles, early access telekinesis.
Psychics get suggestion and aversion earlier, both really good enchantment spells. Aversion either takes someone out of the fight or lands sickened on a save.
If you ever make it to level you want to get this beauty of a spell.
http://www.d20pfsrd.com/magic/all-spells/e/etheric-shards
This project would be much easier if The Variant Multiclass Rules had been expanded into the Psychic classes - I’m sure Hypnotic Stare would be something you’d get by 7th level if not 3rd VMC’ing into Mesmerist.
To trim down the amount of multiclassing your wishlist requires, you could consider the 1 level dip into Mesmerist and then going full Sorcerer and take Crossblooded for both the Fey and Psychic bloodlines. You’ll cast your spells as a Psychic caster and get some nice spells from the Psychic spell list as bonus spells while also getting the Fey bloodline’s sweet DC bump.
I think there might be a feat that gives you a limited Phrenic Pool, but I can’t find it atm. I know Crossblooded delays your spell casting in the same way as just dipping one more time, but if you’re making this character to be a villain, I’d be more concerned about keeping the numbers cleaner with less multiclassing. Plus, you have 2 classes geared off Cha, instead of having a third class on top of it all geared off Int, and Cha is just a better ability score for a manipulator to have, imo.