Former main SAM here, it's been put on the back burner lately pending Masamune. I've been working on resurrecting it lately due to a viable 4 hit build. I think this is especially interesting because with Atma of the Apocalypse 15% triple attack, you can WS, get 1 attack round, then WS again. Even then, each WS also has a chance to triple attack, giving some very nice spikes. Clearly, the effect isn't the same with a 5 hit build.
Yes, you need 105 Store TP to reach this with a 464 delay weapon. This is still a pain to reach without sacrificing a bunch of haste or strength though. Lets look at making this feasible:
Key points:
Store TP trait+Merits +35
Store TP Major Atma +20
Keitonotachi +2 +12
Rajas Ring +5
Rose Strap +4
This puts you at 76 Store TP. Still need 29 more. This is where you start getting options to fill the spaces.
Currently, I'm using the following to make the difference:
Ace's Sabatons +5
Unkai Haidate +1 +5
Shinimusha Hara-ate +9
Hachiman Kote +8
Brutal Earring +1
Chiv Chain +1
29 in total. This gives me a true 4 hit build and 16% haste. Clearly, there are ways to do better but this is what I have right now. First order of business is to build up enough storetp in other pieces that you can wear something else on your body or look at building up enough to start swapping hand pieces between haste and str which I don't doubt is completely possible.