I like Pariden. A lot. I have two small suggestions below I would like to timidly propose for a future patch, because I would like to like them less.
Currently, I am forbidding myself to play as Pariden. It's just too tempting. I'm happy to see the AI play it, because it remains unaware of Pariden's potential, but I wonder if Pariden is an incarnation of the Dark Side in a prettier form.
While the miscellaneous perks of Pariden blood are well and good, and having access to some upgraded staves is alright, and being able to purchase Apprenticeship in the Elements can be quite helpful (I like having all of my champions be able to caste Haste), it is the combination of its other two traits which synergize incredibly well.
1. Scrying Pool. It's dirt cheap to build, accessible without any technological breakthrough, and can be built in any dwelling. I've played 2 games in which I had at least 2 cities with 5 Essence this way (settled a 3-essence, built a scrying pool, made a Conclave). Building a SP is a no-brainer in every single city, since it requires no tech and tuppence in labor. Using Meditation will give you lots of mana, which you can use to cast...
2. Arcane Monolith. This spell is so devastating, you can use it anywhere unowned you have already explored, you don't even need to have active sight of all tiles effected. You can use it to spamlock territory you want to settle later, to block movement, or even to create your own immediate ZoC to cast Freeze etc. It's dirt cheap to cast, instantaneous, and has no cooldown.
I would suggest slightly increasing the labor cost of the Scrying Pool, and having it require a low-level tech, such as Sorcery.
I would also suggest slightly increasing the cost of Arcane Monolith, and giving it a cooldown of at least 1.
Peace