Any way to beat Arena Obelisk with 2 Players?

[PhoenixPrime]

Is there any way for two 'normal' Rogues to beat the Arena bosses once they get enraged with the Obelisk?

We've tried all the various tips (stand by the door, no pets, etc) but we the bosses still end up getting enraged.
Plus without pets we are so weak that we just end up dying.

We can beat all the other environments, except for this one.

* Are there any pets that work in this environment? All of them seem to eventually hit the obelisk from what we see.
(Note: I'm pretty sure that when we used Kelvin he did 'not' manage to stun the spider boss, so not sure if stun pets work here?)

* Any particular weapons to use? Using bows right now, would daggers be better?

* Are there any particular skills that would be useful? We're primarily using Aimed and Nox right now

The arena was 'fun' until we starting getting the obelisk environment over and over, 8^(.

Would love to hear how to beat this environment without having to scrounge up a full party all the time.

Thanks.