The Dreadsteed is the most awesome mount in the game!
A few tips: First, you do do not need the key for Scholo. Once you're outside the instance with a couple of friends, just life tap all the way down, then use hellfire. You won't lose any durability when dying from hellfire. Run back to your corpse, then through the door while still in ghost-form. Once on the other side of the door, ress, and 'use' the torch to open the door for the group.
You can read up on Scholo in the zone section here, but keep in mind that only one person in the group can loot the key to the viewing room off Rattlegore. When I did the quest, we were 2 locks (68 - me - and 60) and a priest (70). The room with the locked door to the viewing room is filled with magic immune mobs, so we couldn't get through. We solved this by having the priest picking up the key and soulstoning him. Then we, the two locks, ran into the room with the immune mobs and engaged them while the priest opened the door and ran into the next room. He died, and waited in ghostform until we got back, jumped down to the room (the room with the magic-immune mobs are right after the entrance to Scholo, and you can jump down), ran into the viewing room and died there. Then he ressed and resurrected us. Or, that's how it should be :/. I happened to loot the key, so our actual attempt was quite a bit more confusing, and we ended the tour at 5% durability.
Dire Maul is not too bad. One problem here is that you need the key for it, which you get in DM east, I think.
As for having a friend with the summoning items, that's not necessary: I know that there's a list of warlocks with the items here on Alla, but it's nothing compared to this list: http://www.wowmb.net/forums/showthread.php?t=8413
Good luck getting it!