The trinket "Barov Peasent Caller (Barov Peasant Caller - Items - World of Warcraft)
Is very useful in the arena.
Whats so good about it is that it follows a rogue when he vanishes, or easier said, if a mage use invisibility, and has already attacked you when those "helpers" are out, it will follow the mage and get him out of it.
This is great to avoid stuns, or any rogue opener.
Cheers