Rikkas will be the best deck in the box. It will be on the level of Aromages or Weather Painters. Definitely KOG worthy but not top tier. Other than that, if you don't want Rikkas or you don't have a water deck to upgrade, this box is a hard skip unless you are after one-of tech cards. MST is not needed if you own Cosmic Cyclone.
Aromages when the gear of fortress came out was not amazing, had some tournament tops but nothing special, Weather Painters actually has tournament wins. Weather painters still a good rogue deck but Aromages have fallen off hard.
Could be, rikka weakness is that it can't dodge pesky barckrow every turn as weather and aromage do. We have yet to see what build is better, maybe rikka can turbo tytannial idk.
I'd say rikka will perform better than aromage. On a side note you can combine them
Rikka will be a consistent deck at the very least; 2 searchers and 1 of them searches 2 cards. You just need to have 1 plant on the field, you can even play spore/bulb + what grows in the gy
The deck first turn play (the only one and the best it has) is kinda weak, kanzashi can protect herself but only from effects any other boss can beat her by battle due to her low stats.
.....To make your opp tribute during their turn you need to open a specific set up of cards; you will only search once with mudan and it must be glamour if you wanna end with kanzashi.
You need an amazing hand like mudan, flurries, tranquility + anything else or glamour replacing either tranquility or flurries