This I like. And I'd like to add: If a unit has several weapon options, start with one and see at what point-level they will switch to another. Eg. Necron Immortals have a Gauss Blaster. They can have a Tesla Carbine. Will they switch at 10 ppm? No. Will they switch at 5ppm? No. Will they switch for free? Maybe, depends on preference. So a Gauss Blaster and a Tesla Carbine are of equal value. (FYI, in the Codex they are.)
"But your basic 20-points Tomb Blades still pack a heavier punch than a Necron Immortal yet also benefit from increased manoeuvrability." WD389, May 2012.
yep, they know when something is balanced.

