I see, so it's SkarmBliss together that you can't quite break. Sounds about right.
That's pretty standard, but it's not a great set for this team. I recommend 80 Hp / 252 Atk / 176 Spe Jolly, with a moveset of Iron Head, Fire Punch, U-Turn, and Wish. That'll help with your problem, it can at least seriously damage Blissey and Skarmory more. Also, Iron Head is the only thing you should be doing stalling with, to increase the damage of Toxic Spikes.
Oh yeah, Gengar usually won't switch out on Jolteon for two reasons. One, usually they don't have a Pokemon that resists both Ghost and Electric, and two, they're probably hoping to revenge it quickly. Also, Charge Beam is a common move to use on Gengar, and a lot of people know that.
It wasn't bad, I got some good things, like a new Xbox 360 to replace my old crappy one that has died more times that I can count on both hands.