[RPG] Critical Strikes & Attack Bonus-

Another of the issues that the LGS owner discovered when creating his character was that the cost of Attack Bonus is higher over the entire run than the much more flexible, Focus Points.
--He didn't feel that the One Round switch-out to re-allocate Focus was enough of a balancing factor to reflect the cheaper cost, especially given the fact that AB and Fo can be used in conjunction.

He and his wargaming buddy then offered slightly more complicated ideas to make Focus more finicky, such as requiring a roll to Maintain Focus, and so forth.
--While I think that is a cool idea, I'm pretty certain that the same net effect can be achieved without adding a recurring mechanism, let alone one that requires an additional roll.

Prior to his noting that mathematical error on my part, I had been contemplating the nature of Critical Strikes, and how I wanted character skill/ability/prowess to reflect more on their frequency than the simple 'dumb luck' of rolling a 20 on the die.
--I am currently thinking of the following, or something like it:

* (AB / 2) lowers the Critical Threshold

This simply means that more proficient fighters would benefit from more frequent Critical Strikes.

AB +2: 19-20
AB +4: 18-20
AB +6: 17-20
etc.

I still plan on revising the cost of both AB and Focus, but I am asking for your input on the matter of removing pure luck from the Critical Strike.

Thoughts?

[Milieu][RPG] The Khem- (Ethnicity)

(c) Copyright 2000, 2008, 2009 Kyrinn S. Eis All Rights Reserved

Description: Khem are a tallish, wiry people; female Khem stand around five feet four inches tall and typically weigh around 130 pounds, while males are perhaps 5" taller and weighing 160 pounds. Their long red hair tends toward red-brown or strawberry-red, but turns grey or silver with age. They have a pale complexion, and most have green eyes. Khem have a lithe, wiry build. They are adroit and cunning, with the ability to adapt to virtually any sort of social/work environment, so long as their Yirinn neighbours provide the model for them to copy.
Khem are typically apart, cunning, and quick-witted & -tempered. Culturally they are Epicurian, enjoying the good life with much wine and dancing. They are also suspicious of outsiders, and possessive of their ways to an ultimate end, if deemed necessary. Provided they live so long, they have a biological lifespan of roughly one century.

Restrictions: They are required to have a minimum Dex and Chr of 11.

Special Abilities: Khem have a unique adaptive ability that grants them a (Int or Wis + Cha + Exp) point pool which functions in all regards as Focus.

Critical Tests: Khem save at +1 vs. Lifeforce (Death Ray), Experience (Petrification), and Control (Spells).
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600
700
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1,300 XP