For all you math geeks out there I made a discovery on Jishnu's a few months ago that I've been hesitant to post the results for due to fear of the SE nerf-bat. Basically, Jishnu's is the ONLY weaponskill where ftp damage is applied to every hit. How did I come to this conclusion? When I first got my Gandiva and started playing with Jishnu's, I noticed that quite often the numbers I was getting were significantly higher than what the math said they should be. I did some tests on worms in La Theine and found I was getting Jishnu damage in excess of what I SHOULD have been able to get at max pDif and full crits. Since it's pretty well known that Empy aftermaths don't proc on weaponskills and been proven that Dead Aim does not effect Jishnu's, there had to be some other reason. Proof finally came when I was brewing Cuijatender randomly for a friend.
Brew does several things to your character, but for the purpose of this discussion only 2 things are relevant. It sets all your stats to 999 and raises you pDif to max regardless of distance. Using an 85 Gandiva and Antlion arrows, my total base damage with capped FSTR2 is 172.
999 DEX * 0.6 = 599.4
599 * 0.85 = 509.15
Total base damage for Jishnu's not counting ftp = 681
I had both light gorget/belt on for a bonus of 20/256's to ftp which totals to 1.828125
The only crit damage bonus I had was 30% from Razed Ruins. Since this was a brew I made no attempt to stay in the sweet spot so True Shot is out.
1.828125 * 681 = 1244.953125
ftp modded base damage = 1244
1244 * 3.75 = 4665
4665 * 1.3 = 6064.5
6064 max damage on the first hit
681 * 3.75 = 2553.75
2553 * 1.3 = 3318.9
3318 on followup hits
So total 6064 + 3318 + 3318 = 12700 should be the max damage on Jishnu's in this situation.
However, except for one weaponskill I did 18192 damage every time.
18192 / 3 = 6064 meaning not only does Jishnu's ftp bonus apply to every shot, so does the bonus from belts/gorgets.
The one weaponskill that did less did 9796
Non-crit Jishnu's hit is 1244 * 3 = 3732
6064 + 3732 = 9796 meaning I missed one shot and failed to crit one shot (Ranger accuracy strikes again...)
As an aside, a total 5.25 ftp (1.75 * 3) vs. what would normally be the case of 3.75 (1.75 + 1 + 1) amounts to a 40% increase to the base damage... the same bonus that Dead Aim applies to ranged crits. Coincidence? Probably, but it would explain somewhat why Dead Aim doesn't apply to Jishnu's (although it should probably still apply to Arching/Heavy) and give some weight to the argument that this unique handling of ftp is intended. On the plus side, this also means that Jishnu's is hands down better than Sidewinder in all situations, including outside Abyssea.
Edited, Oct 16th 2011 10:34am by Saelae