Temple Bell seems out of place considering the power of your deck. If you're playing this against similarly powered decks, giving your 3 opponents free cards would be very deadly. If you added
Mind Over Matter it would combo with
Temple Bell though.
You don't really need
Omniscience, and it seems pretty slow for
the general power level your deck is sitting at. However if you can get it down it should just win you the game, so it's up to your opinion regarding this.
Multiple copies of
Laboratory Maniac don't do anything for you, so you should cut one of them. Personally I would cut Jace, as it can be countered by more spells such as
Dovin's Veto. The desperation card draw doesn't really seem worth it given that downside.
Psychosis Crawler is honestly a bad card. I have played it in multiple decks (Aesi, Gavi, and Sai) and ended up cutting it from all of them. Aesi could
clone it and it still wasn't really worth it. Anecdote aside, your deck really doesn't need it to win.
Consecrated Sphinx is a little slow for what is seemingly a cEDH level deck. It is far from the worst card you could play however, so you could very reasonably leave it in.