Sarklii is actually a more dangerous one as he can be put on Large ships as well. I'd point him out at 6 points for the 2 PS reduction and 4 points for the 1 PS reduction.
Yes, I agree he's more deadly. He can also bump ships back into Predator's threat range, which would make it a great include in a list with Sarklii.
I like your Fel's Wrath. Very Wingman-y. I'd keep him right where he is at 23 points, since he's already overcosted for his crap ability.