The Cast XMR CryptoNight GPU miner for AMD RX VEGA 56/64 GPUs has just been updated to version 0.9.5 with added support for the CryptoNight Heavy algorithm used by coins like Sumokoin (SUMO) and Haven (XHV). The new miner version comes with 0.5% performance improvement for the CryptoNightV7 kernel that it also supports. You can also use Cast XMR to mine the old CryptoNight algorithm, though now with ASIC miners available you probably wouldn’t want to do it. You can use the --algo command line option to set the desired algorithm: 0 for CryptoNight, 1 for CryptoNightV7 and 2 for CryptoNight Heavy. As a reminder, Cast XMR is a closed source miner and comes with 1.5% developer fee included as a means to support the further development of the miner.