Thoughts on Complete Scoundrel?

[VonRichthofen]

Then take them at 19 and 20. You gain 4 skill points, a trick and 2 fort.

I'd rather pull fighter through to 20 and have my Devastating Critical by level 22.

Mattdm is right: Does the fighter really increase in power by adding this? I think there's a dozen easier ways. (apart from not being a fighter in the first place )