What changes the answer

The supplied high-MMR community post explains this role-based philosophy, but it predates the current 2.0 launch window. Use it as a framework and cross-check every tech name, cost, and effect in the live tooltips.

Version and evidence boundary

No current 2.0 tech ranking or win-rate sample was included in the supplied evidence. The answer is a decision method; it does not claim that one unit’s tech is currently optimal.