My understanding (I'm not 100% on this) is that you should load up Phoenix with one big transaction for the max you would want to hold there. Then you just pay the fee once.
Yes it's the same with Breez. Send the max you plan to receive and then send back most (but not all) of it, to have the channel with as much inbound as possible. Then you can receive.
If you plan to mostly send from the wallet, then of course keep enough to spend on it.
Both Phoenix and Breez are great non-custodial LN app. I prefer Breez for the PoS and lower fee but it's not by far.
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That makes sense 🙃now I know for next time
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Yeah, it's no so obvious for a first time strategy, but it seems to be best practice.
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Yes, it takes 10ksat to open a 0 conf channel with Phoenix, I'm pretty sure. After fees all of it can be spent, after which you have to refill the channel. It's not that much different with Breez, though they use entirely different but similar systems (one based on Eclair, the other based on LND)
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