Just to share my opinion,
What I think is that 120luk, temporal luk boots is over-rated here, in fact if you run through the statistics 80% of the char
from ROPD uses Temp Str or Agi boots,
If you are talking about "hybrid build" don't underestimate Temp str, cause @ 120str you get 95atk at +9, nab cloth
another 30atk,
Furthermore if to compare 120 str with 90luk & 120luk & 90Str
30 extra str give you additional 15% atk on your based weapon, which is 33atk if you are using a thanatos katar x 5 EDP.
as well status atk is x2 for total atk calculation. etc etc...
for 120 luk wise, additional 30luk from 90 it only give you approx additional 10atk from there, yes.. you benefit an additional 36%
crit damage from your boots if +9, but with FAW Fatal Enchant, petal card, the crit damage is already high enough
using Temp str you can also use FAW FS enchant with wakwak to further increase you atk damage,
if compare to 120luk & 120str, I would prefer 120str and I am pretty sure the crit damage difference between this setups wouldn't
make much differences since that additional str give you quite high sum of additional atk unless some expert here can prove me wrong.
And also don't forget adding str increases your skill RC,CRS,etc dmg as well as your crit dmg. While having 120luk will only
increases your crit, if you are really looking for higher crit damage suggest that to go with a DD crit, instead of having
wasting 120luk on katar, where the crit dmg is here but not there. =)
Crit dmg% is added at your "final damage", thats why its so beautifull. The atk from str/str boots and w/e is indeed beautifull, for skills. When you are dealing with autos, specially crits, your atk should already be high enough due to weapons and edp, and now its time to max out your multipliers.
I have a 120 str gx, with like 20 luk, and even the FS16[wakwak] FAW giving 116 pure eATK, my fatal10[petal](aka 25% crit dmg%) deals more damage on crit.