With little to go on other than "Priestess of Corellian" and "good (non-int) stats" it's a little hard to tell. It would be a LOT easier if we knew her exact stats so we could match the Dilettante ability to them.
Fighter: if she's not built as a melee cleric, I'd stay away. Otherwise look at Cleave, Reaping Strike (if she's using a 2-HD weapon) or Tide of Iron (if she uses a shield)
Paladin: Nicely reinforces the Divine aspect, but not great if she's not melee based. Regardless, check out Bolstering Strike and Enfeebling Strike
Ranger: Reinforces the elven (woodsy) side of her heritage. Almost certainly bad (she probably doesn't have a decent ranged weapon or use two weapons), but Twin Strike and Nimble might still be worth it.
Rogue: Sly Flourish and maybe Piercing Strike if she's willing to stick with a dagger or other light blade. Since that's generally a suboptimal choice for her, I'd stay away.
Warlock: Since she's a 1/2 elf/cleric, I'm guessing she's got a pretty decent Cha. Eldritch Blast or Eyebite.
Warlord: Reinforces the Leader aspects. Commander's Strike will be good no matter what. Wolf Pack tactics won't be quite as much unless she has a good Str (in which case it might be better). Furious Smash will be quite good IF she has a good Str and terrible otherwise.