Encumbered AGI Penalty

[AndMetal]

I've been working on correcting the AGI calculation (Client::CalcAGI()) for when a client is encumbered:

        sint16 str = GetSTR()*10;
        if(weight > str) {
                //ratio is wrong (close), but better than nothing
                val -= (weight-str) * 100 / 1500;       //WR said /1875
        }

And was able to calculate using the Titanium client that on an Iksar Monk (any level) with a base Str of 75 & base Agi of 120 it should be this:

val -= ((weight - str) * 100 / 1250) + 1;	//since we're using ints, we're depending on this being rounded down (floor'd) automatically

However, once I put 5 points into Innate Strength (verified no other AAs trained), the calculation was off: at 90/85 weight (so 5 over), the client was showing 116 AGI & the server was showing 115 AGI using the new calculation.

I've been meaning to find out how the (linear) slope has changed (from -0.8), but it's a pretty time consuming process to add 40 pp (which equals 1 weight) & record the results dozens of times.

I guess I wanted to see if someone (with more free time than I do) would be willing to help me calculate this out.

EDIT: After a quick calculation, 10 STR from AA changed the slope to -0.71428571428571. On average, 1 STR contributes -0.010666666666667 to the slope, but 1 STR from AA appears to only contribute -0.008571428571429.