I killed up to general vezex, lich king, and Ragnaros on my warrior.
Every week on tuesday, I log on to my warrior, extend the raid lockout in the raid menu, and make a group in the group finder and turn on auto-invite
Log out, log onto my alts and get into the group on the group finder automatically, wait about 2-3 minutes to get group lead and switch it to whatever difficulty you want (ulduar and ICC require 25 man, ICC is heroic, iirc pureblood firehawk drops on any difficulty) and just walk into the raid, and you're at the last boss.
Warrior doesn't get saved because he isn't there, bosses get killed and I get to skip everything but mount bosses.
I have 11 level 100s but I only do it each week on my warlock. I'd go insane if I did it 10 times a week =p