Include more stats in gold efficiency calculations

[TheKevJames]

Every single ignored_stats should be covered, if possible. This includes pretty much all unique effects.

As a first step, this may involve returning efficiency with effects on or off, eg. Warmog's is a% efficient without "Warmog's Heart" and b% efficient with it active.

As second step, we might be able to consolidate these: eg. "Warmog's Heart" is active (on average) c% of the time, thus its efficiency ranges from a to b% with a mean of (bc + a(1-c))%.