I’d recommend keeping UTXOs above 1M sats (5M is even better)

Transfer on chain after that threshold, and set the fee outside the first 5 mempool blocks and then just wait. It’ll optimize your fees while also confirming within a day.

Or even better, get 1 million sats on an exchange and use it to open a channel with nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5