I would say do something like one of the old clan leagues have 4 main comp mods then a pool extra mods a mix of comp and fun, look at say 2016 cl.
[Parrot], [Alpha], [Parrot], [WAPOW]
[NOoT], [TL] and [TA]
Clan League 2016 2nd place holder.
Clan League 2017 1st place holder.