I noticed that in the June 2014 WS update Tachi: Enpi got a boost to fTP 2k+ but it wasn’t updated in BGwiki. So I derived the new values and I am posting here as a reference to update BGwiki.
I did my testing on Ogre Fly in The Sanctuary of Zitah where my attack is capped on these mobs at 713. If you saw my other post you would see I derived the Ogre fly def/vit/lv in area, their values are posted on BGwiki now.
I used 99SAM/49NIN with a 24 base dmg GK. Weapon rank = 2, so my fSTR capped at 10. My STR was 227.
The bonus to fTP should only occur over 1k TP so I used sekkanoki to confirm fTP @1k was still 1+1 by checking the math.
(Wpn + fSTR + WSC)*fTP*pDIF = dmg
Wpn = 24
fSTR = floor(24/9)+8 = 11
WSC = floor(227*0.6) = 132
ftp = 1(first hit) + 1(2nd hit) = 2
pDIF min = 3.5 + 0.2(Dmg limit+ SAM) = 3.7
pDIF max = 3.7*1.05 = 3.885
min damage = 1258
max damage = 1320
Enpis were in range(avg 1282): 1264, 1266, 1297, 1264, 1299, 1281, 1288, 1266, 1298, 1305
Next I went up to 2k TP(which I tried to get as close as possible to).
Enpis (avg 1976): 1928, 1913, 2096, 2106, 1843, 1973
Next I went up to 3k TP.
Enpis (avg 3200): 3155, 3229, 3215, 3256, 3220, 3153, 3153, 3227 3160, 3230, 3147, 3294, 3206, 3146, 3260, 3190, 3197, 3212, 3154, 3207
From 1k to 2k was about a 1.54x increase or fTP close to 3. So 2+1.
From 1k to 3k was about a 2.5x increase or fTP close to 5. So 4+1.
So Tachi: Enpi fTP values post June 2014 update are 1/2/4 at 1K/2K/3K TP. BGwiki will be updated.