As requested by Eternal:
And FYI geomancy proc chance uses the same as weapon proc chance. In other words, 19%.
(http://i15.photobucket.com/albums/a374/ILY870/daravon01.png)
(http://i15.photobucket.com/albums/a374/ILY870/daravon02.png)
You might want to note that the break percentages for Katana seem to be equal to the Katana's WP. Might be useful for some patches.
Note, in the following, e is Euler's constant, or 2.718281828459045...
This should be stickied. IN fact, there means there's a serious precaution that needs to then be understood by ALL patchmakers.
1) Xif's ASM hack affects all proc rates on every formula except formula 2D or 38, for "status" procs and "spell" procs.
2) Unless you are using a formula hack or the above hack, the default rate of "spell" procs is 19%.
3) If you use anything other than formula 2D or 38 [except variable % hit formulas], your proc chance is:
19% if All or Nothing or Cancel
~5% (19% * 24%) if Separate
~7-19% to proc 1+ statii, if Random. The technical formula is 19% * (1 - (1 - 1 / X) X), where X is the number statii you are trying to add.
4) If you use variable % hit formulas, your proc chance is:
Hit% if All or Nothing or Cancel
~Hit/4% (Hit% * 24%) if Separate
100% - e^-Hit% to Hit% to proc 1+ statii, if Random. The technical formula is 1 - (1 - Hit% / X) X, where X is again the number of status effects added.
5) If you are using formula 2D or 38, your proc chance is:
100% if All or Nothing or Cancel
24% if Separate
~63-100% to proc 1+ statii, if Random. The technical formula is 1 - (1 - 1 / X) X), where X is the number statii you are trying to add.
NOTE: As far as my ASM searching has shown, there is no special hard-coding forcing RAfa/Malak formulas to proc at 6.25%. It's just the game used X = 7 and random for Space Storage, which is a very low chance (around 12.6%).