20% from weapon, 10% from hotheaded, 5% from gloves, 36% from amulet... some amount from potions/buffs, and the rest from Wits. The majority of crit is not based around Wits, it's based around gearing and other factors. Anyone can do that and all you have to do is fill in the rest with Wits. It's threshold based and doesn't scale.
You can say 'crit based' but it wouldn't do to call it 'wit based' because there isn't any particular focus on wits. In a matter of fact most of your weight is going to be in Str or Int.
That's really why I was confused; if you combine this with round robin initiative, and also add in factors like scripted fights and artificial amounts of initiative, then Wits by itself is weighed fairly low when looking at the entire picture. Buffing Wits doesn't seem that far off (not saying if it is right or wrong, just saying that it wouldn't be too bad to consider).
No, that is different. Every character has access to high crit in the end game through powerful gear but this gear is not available for the majority of the game. A proper crit build starts early in the game and invests in Wits for crit over the main stat and in the crit damage multiplier skills (e.g. Scoundrel) over pure damage skills like Warfare, Huntsman, etc. Your base damage and main stat really do not matter much when you have high crit and crit multiplier.
So, for example, if towards the end of the game an optimal Ranger would have maxed out Finesse, Warfare and Huntsman then a crit Ranger would have some points in Finesse, high Wits and an even distribution between Ranged (less damage overall than Warfare but synergises with crit), Scoundrel (practically useless for Ranger for the vast majority of the game unless you are running a crit build), Warfare and Huntsman. It is a completely different build for speccing and gearing and plays out in a different manner. A crit build also has a higher damage output overall than your vanilla cookie-cutter pure damage build.
Anyway, this is a discussion about Initiative so I will let you get back to it, but the point that I am making is that Wits is hardly an useless stat.