User blog comment:CharmingCharlie1/LR Black & Zamasu. Is it true that it's still the best LR? I don't think so./@comment-28362353-20190204154745/@comment-31661832-20190204205043

Rosemasu is not a bad card simply because he doesn't fit a certain playstyle. Just because you eliminate the earlier opponents before he can get his stack does not make him a bad card, it means he doesn't fit your playstyle. As Negative stated, he can very easily get his stack and hit hard if you make an effort in the earlier stages of the event.

For some people, the idea of having a stronger card for the later stages trumps getting through the event as quickly as possible. It's not "casual" to plan ahead instead of blazing through the event. It's a completely valid way to play and Rosemasu is excellent for players who do that.

The only time Rosemasu would be worse than the average LR is if you are specifically trying to clear an event quickly, but there are very few situations where an extra rotation or two will make a difference. So far the Supreme Kai missions and the EZAs are the only timed missions and they tend to be pretty lax imo.