1. How to set up ASM correctly? I have all AMD RX 570 RX 580 4GB cards, Eth only, Ethermine pool (is this the best pool for Eth?). Anyone uses ASM 2 for such cards? And about dcri. How best to prescribe fixed or in auto mode?
Can't speak to ASM, no experience.
2. I use ssl Ethermine pool. Does SSL slow down the encryption process (more stale shares example )
It's been my (limited) experience that SSL reduces stales, and improves stability.
3. My config for Rx 570 580 4gb
EthDcrMiner64.exe -epool ssl://eu1.ethermine.org:5555 -ewal 0x1 -epsw x -cclock 1150 -cvddc 850,850,850,850,850,850 -mclock 2040,2050,2040,2050,2040,2040 -mvddc 850,850,850,850,850,850
Can you recommend what to add to it for stability and more efficiency.
You might want to add a secondary pool url just in case.
I'm still learning about AMD cards myself, but the best advice I've gotten is to keep tweaking the settings for each card until you get the best results. I've been using config files to store my settings and keep .bat somewhat neat. That way I can copy my best config, futz with the settings, and revert back to my original config if I screw something up.
Out of curiosity, what kind of hash rates are you getting with those settings?