I think you'd be better off without trying to do drum sounds in the build. The Taiko does take up a load of room, but the better reason is that you can get much more mileage out of a prebuilt drum machine and some FX than you would with trying to replicate drum functions in the cab. A few more things that could go include the Nerdseq expanders, all of the mults (you shouldn't need buffered mults...there's not enough CV scaling stuff in here to justify them) should probably be removed in deference to some inline mults and/or stackcables. Another thing: the VCAs in the Tangle Quartet are linear VCAs, and while you can use them for audio, it's much better to use logarithmic VCAs for that, as those have a response curve that more approximates how we perceive loudness. Or better still, something based on the Veils (or the Veils itself) where you've got an adjustable response that can go anywhere from linear to logarithmic.
As for the Akemie's, that thing is such a CHONK that you might be better off just sticking it in one of 4ms's powered Pod cabs and treating it like a standalone instrument...which wouldn't be a bad thing, as algorithmic FM in of itself doesn't need filtering, etc. If necessary, you could even go with a Palette 62, as that'll have enough room for the Akemie's, plus an Intellijel Quadrax/Qx for the envelopes needed for modulating the index, etc. And you can use the tile row there for your I/O and a few other useful things (like a Quadratt for mixing envelopes with inversion if needed).