Summer of Pain was awesome and I would love to see it again.
I think this was the best content Kabam has ever put out. Most of the fights were pretty fun and challenging. What I loved about the design more than anything though was that each fight had #tag objectives.
This was excellent for a few reasons.
1) I liked that it incentivized me to really think what champions worked.
2) I liked that I could choose to either go in with a champion that filled all three objectives but wasn't the most efficient or I could choose to use an easier champion that only filled 1 objective.
3) I liked the extra incentive to rank up certain champions that weren't as relevant before.
It'd be great to have something like this again.