Sounds about right. Though, I'd say that R Grails go to skill level 3, which is 1+1. One more isn't 100%, but I believe if you trust in theory of gambling, you'll gain from it. I don't think it's worth the time.

Also, I've stopped caring about leveling my SR weapons past slvl 2. Paying 2 points for 3 points, and then 3 points for 4 points just isn't worth your time now that fodder is incredibly easy to come by.

The most important thing is that you spam half-elixirs on Gem Quests, and spend 100k every day on Gem Gacha. That's something that wasn't a thing when this topic came around.