I find these quests mind numbingly redundant and unimaginative, and it doesn't help how much of a chore it is getting to the spots (c'mon devs, is this the best you could come up with for endgame content?) The other day I had a party there for 5 or 6, and it was actually really fun and got done quickly. I think thats the way to do it if you're going to. I'm currently at Oblivion 1. Just post which quest you're on and we can get something together. Don't worry if you're really far behind, if a big enough party can form, getting people caught up takes no time at all.