Taproot is not necessarily the best. Taproot inputs are the cheapest to spend, but Taproot outputs are larger than segwit (IIRC taproot is 33 bytes, segwit output is 43), which means in practice Taproot will only be cheaper (assuming all your outputs are Taproot), if your number of inputs are around 16% more than your number of outputs.

However, Taproot has privacy benefits (eventually, although Taproot use is still low). This is because with key aggregation and lightning switching to Taproot, your address will be indistinguishable from a multisig address, or a lightning channel, or... an ordinals inscription address.

Also, I'm not aware of any Taproot coinjoin pools. Sparrow doesn't seem to let me coinjoin my Taproot funds. Are there any out there that someone could point me to?

Yes and here is guide https://darthcoin.substack.com/p/move-your-btc-to-taproot-address