I'm going to be mining one of those coins above primarily if ETH were to switch to POS or become unprofitable due to difficulty.
I haven't decided which but currently I'm leaning towards ETC because it makes most sense for my non-nvidia rigs. ZEC for my Nvidia rigs and wherever I would dual mine, I would pick SIA.
What's your plan right now?
The masses will follow the masses. ETC, Zec etc. will get a lot of miners their way.
I don't think many miners here will share their strategy openly on this forum simply because there are too many of us. Having a strategy that differs from the masses is important.
The only thing I will tell you is I quit mining ETH over a month ago and switched to ETC. People tend to blindly follow the most profitable coin regardless. Glad I did because in the past 4-5 days, it's taking me double the time to mine one ETC than it did the week before.
It's really about making a stash before the heard arrives...