It was glorious! Though going to Work today on only 4.5 hours sleep kinda sucks I would say it was worth it.
For those interested:
Ex2 went better than expected. The Group was high powered and all of us on discord for faster responsetimes. No real trouble on ex2 except for Vra dieing at the instant he stunned some of us meaning they were out of the fight until they were killed and could respawn (that feature/bug definately needs looking at).
Ex3 was a lot harder than ex2. A huge increase in time to kill bosses meaning a lot more spawns bogging us Down. It got hairy at the end when our healer ran out of aoe heals and several deaths happened. Shard use for rez was necessary as know one had any time to spare.
A sound plan and good coordination along with all sticking to the plan saw us through though. In total we got 25 ish runes and at the rolloff we had 4 20´ies. Thats even more improbable than succeeding on the challenge itself!
Thanks Mort for the challenge. Though I initally thought your parameters were too harsh I now stand corrected. In the best way possible!