I should probably point out something that may have been misunderstood from what I've seen on the wiki; for PAR and PSN, the chance of the effect proccing on the target should be the same across all moves that can inflict it. This is because the equation for checking whether it lands is simply 100-(resistance stat * 3), so the only thing that affects the chance of PAR or PSN effecting an enemy is the enemy's resistance to the status effect in particular.
What the "strength" of these moves affects is how powerful the effect is -if- the effect lands. In the case of PAR, the effect of the different strengths of the moves is the duration of the PAR. In the case of PSN, the effect of the different strengths of the moves is the duration and the amount of HP lost per "battle count".
In short, the strength of the effect has no bearing on whether it lands, but only on how long the effect lasts/how powerful it is.
The DTH part I mentioned is also entirely my conjecture, but it seems consistent considering the few times I used F14 optional 1.
Additionally, all the move info and such was taken from the plus disk omake text file, which means that it was included with the first version of the plus disk (v2.00). This means there may have been some changes to the moves or other data since, so it may not be entirely accurate, although it's probably as good a starting point as any.