It's not nearly a 25% increase in WS frequency.
Best case scenario (capped ACC with Aurum body) it's only about a ~17% increase in WS frequency. At 90% acc, you only get 10-11% increased WS frequency. That's accounting for scythe delay differences, 2% DA, and (if ACC isn't capped) more ACC on non-sTP body pieces.
Also, 36 sTP is cutting it kind of close. To maintain the 5-hit even assuming a missed hit on Guillotine, you'd have to WS in 20 Store TP (14 from gear, assuming you're eating carbonara). That means you'd have to WS in some suboptimal shit just to cover your bases. On the other hand, switching ACP body out for Aurum and Ecphoria out for Sniper +1/Toreador's is only a net loss of 3-4 ACC, but gives you 38 total sTP, 3 STR, 3 DEX, ~16 ATT, and more leeway in gearing for Guillotine.
Again, though, it's really not something you'd wanna do unless you can get over a 90% hitrate, bare minimum. Then there's the food discrepancy (unless you're mega-rich and can spam arrabbiato, the best food ever, in which case there is no food discrepancy). Is it worth the gear changes
and the switch from red curry or HH pie to carbonara? Debatable, but probably yes unless you can cap your ATT to get the most of curry's boost.