This is not a good idea.
Kaiten could function only because it couldn't spend literally
everything. Otherwise, the more efficient skill would be the only one worth having on our bars. Increasing Kaiten's consumption to a level where it could consume all available Kenki rotationally produced
would remove all resource management, not increase it, once one noticed this and promptly removed Shinten and Kyuten from their bars upon acquiring TG. You'd simply get a Senei and maybe a Shinten (which at that point you may as well just macro together, as they're only used once each per 2 minutes) per Ikishoten, with all else being funneled into TG.
The only way for a TG to provide any increase in management would be for it to consume
less Kenki than you rotationally make, such that it is a preferred but limited action (only useful on Midare or perhaps Tenka, because simply replacing Higan wouldn't do shit). Following Kaiten's cost and efficiency, it could offer roughly 320 effective potency over the average ppgcd of one's combos including their value towards Shinten (as your uncapped spender). That ppgcd is 352.5 at present.
At the 20 Kenki cost that'd allow for Kaiten to increase --rather than remove-- gauge management, one could therefore have a 670-potency non-auto-crit Kaeshi: Midare follow-up or a ~450 potency auto-crit Kaeshi: Midare.
Now here are
the more fundamental problems:
- Kaiten increases our apm slightly. A GCD Kenki spender reduces it. We feel slow enough as is at this point.
- You'd turn literally every Midare into a two-step combo. TG would no longer be a burst tool or any form of novelty, but just part of the normal skill for all intents and purposes.
- You'll have removed a burst tool, greatly diminishing Samurai's burst.
- You'll have removed the capstone / pacing element of TG from SAM from levels 76 and 83 (arguably when SAM has the most actual gameplay going on).