I used multibit years ago - now what? (BTC, BTG, BCC etc...)
So I found a solution that worked for me:

BTC
Blockchain.info have online wallets but you can also just create your own transactions without using their wallet.  Add an address using import and then spend them directly using your private key.  You can manually set the fee and i managed to transfer with ~75sat/byte even though recommended was 225.

BCC/BTG
Transaction costs are still small for these so sweeping works fine using practically any wallet.