I use the AW imr 18650's and 18490's that you posted in both my mech mod and my Provari. I usually run my mech with a kick 2 at 15 watts for the added protection and consistent vape, but I have been know to un kick it and vape at 27 watts or so, just to check out my build and wicking. Usually catch to big of a nic buzz vaping at that high of watts, and prefer the low 15 watt vape better. Plus get to use the kick beauty ring with the Nemi clone that way. A lot depends on how low you go on your builds. If looking at .5 ohms or lower, would probably go with the 30 amp ratted batteries, would be pushing the limits of the 10 amp rating of the 2000 mha AW 18650. At builds 1-1.7 ohms, the 650 & 490 aw's would be a great choice.
But you should really do your own research on proper battery recommendations, amp limits, care maintenance and everything for yourself. Realize, when you choose to go mech, you are the safety check. If it goes critical it's on you. Do not trust what a complete stranger tells you. Gain the knowledge and confidence in you gear, so that you don't have to wonder if the next vape will be your last vape. Mech mods is like jumping into a full blow nitrous kicked super charged funny car. If you don't know what you are doing, you could get hurt.