Colson found an alternative strat for devour that simplifies how we deal with the mechanic. With this method, we don't have to worry about briar patches and running around the boss. Basically, the boss faces where we usually have A throughout.

When the yellow mark appears
Marked player

1. Run in front of Rafflesia.
2. When the mark disappears, quickly run back to the group behind the boss.

Tanks

1. Current MT runs behind the boss. It's ok to spin the boss, she will face the marked player and will not cleave/swipe.
2. OT Provokes during Spit (cast), moves to the front of the boss

Tank Provoke macro so we know who's tanking

/micon "Provoke"
/ac "Provoke" <t>
/mk "Circle" <me>
/p Provoked <t> <se.3>

For a clear demonstration of what to do as the player with the yellow mark:

http://www.twitch.tv/synnovus/c/4243330