Another Ogre CRT die

Ogre combat requires a simple table look-up, based on dividing the total attackers' strength by the defender's, erm, defense, and then rolling a single d6.

There have been several attempts to convert this table to a custom die, or set of dice, but I haven't seen this approach before (though someone will no doubt prove me wrong).

Here she is:

Ogre CRT die - what are your odds?

I've left the 1-6 numbers for reference, but they aren't really needed. I really hope I got the rest of the numbers right...

So, calculate the odds, then roll the die. If the odds beat the ratio, you either get the 'D' or 'X' result (X is better). If you don't beat either of the odds, then you missed! ('NE', which I could add to the '6' result for clarity now I think of it.)

One advantage of focusing on the ratios is that it can include the automatic results (less than 1:2 is an auto fail, and over 5:1 is auto 'X').

But is it any good? Useful? Understandable? Missing something obvious? Did you already do this?

Edit: Some further thought produced this:

Second attempt, which changes the ratios to a division (A/D)

The material presented here is my original creation, intended for use with the Ogre system from Steve Jackson Games. This material is not official and is not endorsed by Steve Jackson Games.