I think 30 mins are to short a time, i mean – im having problems when i try to “hop” between the events. And rewards should be a bit easier to get. I very rarely get to more than 11 stacks even if i try to “hop”. Cant WP while in combat so have to kill things (wich doesnt help most of the time) or run far away.
And most of us have a life, cant play 24 hour/day. So 3-4 days for this kind of event is far to short. Should be at least a week or maybe 2 weeks.
“sometimes you have to PUNCH your way through”