2 easy options to lose those extra points:
1. The 5 Pathfinders turn into 6 Rangers, you lose a bit here other than 6 points. You will lose "Mega Rending" and have to just put up with "Super Rending", also you will likely lose out on a 2+ save. So you are AP 1 less, but get an extra shot. And you take damage more, but have an extra wound to deal with it.
2. Just lose the extra Catapult from a Dire Avenger Exarch. That would put you just under 2k without much loss or difference.
That's how'd I shave the points without any major changes.
With major changes?
I would drop the Council to bump up the rest, and potentially add a 2nd Seer (both in tanks now). Probably too much of a change, though. I do like Doom with a Council that has plenty of Destructors. Being able to reroll to wound with 4-8 templates is just plain nasty. Personally, I don't like to take a squad of less than 8 Warlocks. Any less just loses effectiveness for me, despite the cost. But then again I am odd, and very rarely use Fire Prisms.
Jetbikes instead of Snipers could work, they're much quicker after all.