patience grasshopper. Some seeds take a while - usually older seeds. when you get to 10-14 days (maybe less with this paper towel method) then you can worry about it being inviable.
I'd definitely suggest simplifying your process. Especially if you have a hankering to fiddle or look at it constantly. You need to learn to plant it and walk away so it can do its own thing. you have no influence over this process beyond the simple things. don't change this midstream.. keep doing as you were for this cycle.
Temprature helps. A 75-80F substrate definitely improves consistency of spawn times. Again, it will not put lipstick on a pig, but for anything healthy enough to sprout, it'll shorten the range of time it takes for several seeds to sprout. A heat mat with a thermostat is useful, but don't go cheap and skip the soil probe thermostat option.
A humidity dome can help you avoid watering during germination process. Once it's sprouted, no worries, but if it is still below ground having to water before it sprouts can cause some shifting around that isn't always ideal. water slowly and arouand edges to allow it to soak in as opposed to causeing anything to float if you do have to. Remove humidity dome when they sprout. You'll want this for clones, too (both dome and heat mat), so it'll get used plenty.
Soaking for up to 24 hours is fine. Might help with older seeds.
Simply fill a small seedling pot and tamp it down. Press finger down in middle about 1/2" -- this compresses the substrate a bit where your seed will rest. Gently push the substrate over from sides and tamp down lightly. that's it... none of this 5-step wet tissues with bleach and other chemicals in it. no exposing tap root to light. no touching a very delicate and recently germinated seed to plant it. All of those behaviours add needless risk of a seedling failing.
i don't worry about crown orientation too much. i just make sure that it is horizontal as opposed to upside down. vertical tends to leave more seed shells on when they sprout, and that's a delicate procedures thats best avoided.
how many seed shells you see stuck on a sprout will help you adjust how deeply you plant the seed. Too deep it takes forever, too shallow it has a seed shell or worse the taproot dries out.