Originally Posted by
Sfay
The Enhance material drops are solely useful to level up the Weapons and Eidolons you're actually using. Use them on your stronger Weapons/Eidolons to level them up.
For your regular R Eidolons, you should keep 3 to reach 6 Eidolons for your team, and use the rest the same way, as enhance fodder.
The regular R Weapons are a bit trickier since they give Skill level exp. SSR, SR and R weapons have improvable skills and the most common skills improve the Attack (Assault skill) or HP (Defender skill) by 0.5% per level of every Kamihime in your team sharing the same element as your weapon. Use those to level up the skills of your SSR and SR weapons. On an SR Weapon, use a number of R weapons equal to the current skill level of the weapon (1 at level 1, 2 at level 2, etc...) for a guaranteed skill level up. SSR weapons would require exactly double the amount (2 at level 1, 4 at level 2, 6 at level 3 etc...), and R weapons helf of it if you ever upgrade the skill level of an R weapon, but that's not recommended since you'll get rid of your R weapons eventually. Max skill level is 20 by the way, though you're nowhere close to that yet.
As for the KH, yes you should Break Limit them. The Limit breaking of Kamihime requires materials required only for that, so the only reason to not Limit Break one would be because you want to keep the materials for another one. Limit breaking increases the max level a Kamihime can reach, so that's something that needs to be done when possible.