About point 5, I use Blixt and have the same problem. What I would recommend you to do is to open a channel to a node directly connected with Robosats, or (this is what I do) use Blink to receive, then send to yourself to your Blixt node. This works well and you don't lose a lot in fees. Wallet of Satoshi and Coinos failed with Robosats in my case. Lifpay worked but I don't use a Bolt card and fees are higher there, so don't recommend it (unless you use a Bolt card). With Zeus now you can buy inbound liquidity also, maybe it would work well with Robosats, but didn't test.