Thread: noob questions

Been enjoying this so far but couple of questions that the game doesn't really seem to clarify well.

Is there a point to save crystals for a 10x roll vs just using them one at a time as I get the necessary number?

I understand the weapon/element mechanics but does the "main" weapon damage matter if the overall damage total is the same? For example if I swap an 800 damage weapon with a 1k damage weapon from my sub-weapons to change the element type, will my damage change at all due to having a stronger main weapon?

Do weapon skills apply for all equipped weapons or only the main weapon?

Is it possible to get an (S)SR item from gem gacha?

Where do you buy potions and the like? I know where the exchange function is and have used that to buy mats for break limit items on kamihime, but where's the option to spend gems for things like potions?

What does rage throttle/gauge restriction do? I'm assuming it has something to do with burst gauge but didn't really notice a difference while leveling beowulf. Also do the bonuses from your soul (both current and master bonus) apply to all kamihime or only your personal soul?

Given the fact that I won't be spending money on this and probably won't be getting multiples of a lot of SR/SSR eidolins/weapons, would it be more effective in the long run to break limit rares (or SRs if I have them) instead of simply focusing on the strongest on onset? Also a little confused with the break limit as I have 2 of the SSR thunder lance (yggdra xyston) yet use a break limit on it..... If anyone could explain would be appreciated.

Sorry I know some of these are stupid and straight-forward but didn't see anything about any of this >_<. Any and all help appreciated. I know most of these aren't that important for the type of game this is, but I enjoy min/maxing and theorycrafting and not knowing really bugs me.