skip to uneeded bosses in mount runs

First run a normal raid like Ulduar or ICC where there is a mount that drops on the final boss.
leave the raid two boss before the end like on thorim or Dreamwalker.

Start a new raid with 25 friends do thorim or dreamwalker then finish the boss with those friends.
now you're on the second to last boss with friends saved.

now take each of those friends with one of your alternate characters and form a raid for only that second to last boss.

Repeat a maximum of 25 times for extra chances per week!

The tools you will need to make this more effective.

1. OQueue addon
2. Openraid.us
3. Or try dalaran general it's cross server!

I hope this helped you out in your next rush to get invincible or mim's head!