Earl White, on 31 August 2013 - 12:39 PM, said:
So do you need to keep all 3 variants in your garage to get the elite skills? Or can you unlock all the basic skills on one variant, sell it then buy another variant and unlock them on that one etc.
Also the internal heatsinks on mechs variants are different, does it mean that certain mech variants have better heat efficiency overall than others?
You can sell them once you have 8/8 basics, but in order to unlock Master (and also to unlock the 2x Basic bonus) you *need* to unlock 3 mechs of the same type (light, medium, heavy, assault). If you have other mechs you can advance, then go ahead and sell; but if you don't, you won't be able to "maximize" the bonuses.
Internal heat sinks are just for the stock loadout. Yes, some are more efficient than others, but installing a bigger engine (if it's under 250 rating), upgrading to Double Heat Sinks, and/or adding more heat sinks can all improve the efficiency of any mech.
The most important part of heat sink efficiency is that the DHS included in the engine (up to the first 10) operate at 2.0x efficiency, whereas any that aren't included in the engine's weight will operate at 1.4x the efficiency of a regular HS.