dtgreene: You are, however, going to need a computing device to do the calculations, especially if the campaign reaches the point where stats reach the millions.
To get in the millions you'd have to have quite the level. Your effective stats would be
base + (level-1 * base/2), and wouldn't be complicated at all. For each level if your strength was 10, you just add 5 more... nothing too complex about that...
A computing machine could just be a hand calculator, or maybe a table top program like maptools which can do scripting, quite a bit actually, and a projector would help too... But that's getting complicated, unless the numbers are fairly close you can generally look at two sets of numbers and say '
alright damage is 50, his health is less than that, he goes down' or do quick math to determine how many hits he could take it out solo in how many rounds...