This exploits will make you immune to Fear in Arena.
I leveled my rogue in Stonetalon Mountains. When I fought some Harpies I received a debuff.
Curse of Recklessness
Melee attack power increased by 45.
Armor reduced by 290.
Ignoring fear effects.
2 minutes remaining
It is cast by Bloodfury Slayers.
I asked myself, if this debuff could be used in arena.
Yes, it is possible. I managed to get the debuff and it stays in arena.
[spoiler][/spoiler]
the partner has to queue up for the match
with good timing you are able to keep the debuff 1.5min from the beginning of the match (gates open), which results in an advantage for your team
at stonetalon i managed to get 4 Bloodfury Slayers on me and got within 1 minute the debuff(you resist often because of the level difference, but you will get it)
[spoiler][/spoiler]
I've read that this spell was a former Warlock spell, but is removed from the WL's spellbook since about a year.
Sorry for grammar and stuff. I hope I helped someone.
1337pyro