Please give us more events like Phenoms solo
I just wanted to say that this one gets it right in terms of time, difficulty and the value of the rewards. The games are winnable but not total pushovers without having to field a god squad, they go relatively quickly, it's unlimited (other than the hours we're willing to put into it) and the potential pot of gold at the end of the rainbow is worth the effort.
The current Tower setup is another one that's worth it, on a longer time scale than a two- or three-week promo.
By contrast, some of the challenges (Diamonds in the Rough, for example) take longer, with many ridiculous asks (just because there are buttons for laterals and lob passes doesn't mean they should be the narrow focus of a challenge) and offer a 78+ pack as a kick in the teeth. They make the game a chore; Phenoms makes it fun.