User blog comment:Xeamnz/Ninjas from the beyond!/@comment-4292163-20140405200606

How much have you been proxytesting this? In my testing, Return alone makes this deck extremely gauge-heavy, and if you miss Return then anything that isn't a good topdeck is a death sentence to the the Skull Warriors' self-minusing. In short, situational or high-cost cards like Garyu-oh and Karakurenai need to be avoided. Try Kotaro Fuma if you really want to run size 3s.

What else... Utsusemi (or Body Replacement as it's now being called) should be maxed, as you said this deck leaves the center open often. I don't recommend Serenity - this deck has 2 issues, gauge and self-minusing, and Serenity just solves one by making the other worse.

Hades Fall is an absolute staple 4-of in Katana. 2 damage and a mutual -1 for 1 gauge is godly. This thing is Gargantua good... no, better since it has twice the cost efficiency and -1s the opponent too.

Items work very well in this deck. Their main drawback, leaving the center open, happens naturally in this deck. You can get 4 attacks per turn by retiring your center with Yamigitsune (easily set up with Return) and if you run Fuma they give you a reason to use his Move.

The rest is good though. I'll be posting my own build shortly.