Assuming we're using the same terminology. I call buying all 4 elite skills "eliting" but some people call unlocking elite skills eliting (i.e. buying all 8 basic skills).
You should unlock elite skills on any mech you play. To purchase the 4 elite skills, you must purchase all 8 basic skills on 3 variants.
After you purchase all 4 elite skills on one variant, you doublet he effect of the basic skills on that variant.
So if you want to play a cataphract 3D, you buy the 3d and two other cataphracts. Then buy the 8 basic skills on the other two cataphracts. Then strip all the equipment from the 2 extra cataphracts and sell them or (if you can afford the $2 mechbays) keep them but don't play them.
But yes, absolutely important to get the elite skills. Also, if you aren't going to play enough to get speed tweak, why would you even want the mech? Having 8500 skill points and not being able to buy skills would be frustrating. But mostly speed tweak plus doubled basics is a difference you can really feel. It matters.
*Note, never sell engines. Unless you want to spend a ton of real $$$ to convert champions to cbills. Strip the mech, sell the unused chassis.
*You can save money by just tweaking the mechs you don't care about to earn basics. Max torso armor tweak weapons for 1.2 heat efficiency. But at $2 a mechbay, you may not want to sell. Meta change.
Edited by Dan Nashe, 07 March 2016 - 12:33 PM.