Let's say it's 500 Att and 94% Acc.
500/300 to simplify the pDif shit as 1.66~
515/300 = 1.71
100 base damage to simplify that, ignoring crits.
100 x 1.71 x 94 = 16074 over 94 hits
100 x 1.66 x 95 = 15770 over 95 hits
Would be smaller if 1 Str from Cuch gave more fStr, and even smaller if 4 Dex gave a decent crit boost.
300 Dmg increase in DoT phase over 100 Swings, those 94 hits gave enough TP for 18.8 WSes, the 95 hits for 300 less total damage gave enough TP for 19 WSes.
Let's call it 1000 Dmg per WS and say they're totally accurate WSes.
34074 DoT + WSes, Fora at 94% Acc
34770 DoT + WSes, Cuch at 95% Acc
Noted assumptions: no base damage increase from 3 Str > 4 Str, no significant crit increase from +4 Dex, 5 hits between WSes, ignored WSes, ignored flash/eva buffs/etc.
Now, to be fair, 94/5 isn't an even number, so that's "cheating" in favor of the 95/5.
If you gained any fStr from 4 Str, but not from 3 Str, it would cut the difference down more.
Let's bump it up to a larger sample and consider fStr/Crits.
Let's say 10% Crit rate before Cuchs and 11% after, 100 Dmg vs 101 Dmg, 1.71 pDif vs 1.66 pDif.
After 10,000 swings, 94% Acc, 940 Crits landed, 254,740
After 10,000 swings, 95% Acc, 1045 Crits landed, 280,060
1,446,660 + 254,740 = 1,701,400
1,411,985 + 280,060 = 1,692,045
9400/5 = 1880 WSes
9500/5 = 1900 WSes
1,701,400 + 1,888,000 = 3,589,400
1,692,045 + 1,900,000 = 3,592,045
+2600 damage difference out of 10,000 swings + WSing every 5 swings assuming Cuchs gave 1 fStr, 1% Acc, 1% Crit. A bit less assuming Cuchs only gave 1% Hit rate.