I cannot tell how audible 258ps is (My DAC supresses jitter), but according to things I’ve read about jitter audibility starts around 50ps.
I would recommend jitter supressing DAC like my Benchmark (async rate converter) or separate reclocker before DAC. With Toslink transitions are slower because of the slower slew rate of optical drivers. Slower transitions are OK as long as your system noise is low - otherwise it will create jitter. Because of that I use Furman Elite PFi 20 power conditioner.
If you operate router at 2.4GHz you don’t really have 12 channels since each channel is 3-channel wide making it susceptible to neighbors routers interference and there are other things operating at 2.4 GHz. My microwave operated at exact frequency of one of the router channels blocking transmission completely. I decided to get dual band router and use 5GHz. Since then I haven’t have a single drop-out and it is working perfectly for many years. 5GHz is much less common and penetrates walls poorly shielding my room from the outside 5GHz sources, if any. Also number of available channels is in hundreds. I can detect, after scan, couple of channels being used at 5GHz but their level is very low.
WiFi connection makes you independent from computer quality, playback program, etc. saving you money. AE is limited to 16/44.1 but all my music comes from CDs. Apple TV is tempting, but it outputs at 48kHz making interpolation of 44kHz data, that might result in loss of sound quality.