(2) There aren't official levels of armor, but I'd say there are four, splitting metal into light (haubergeon set) and heavy (plate mail). And ARC can't wear either of them. An entire set at any level will generally be a mixture of WVR and LTW recipes. (3) Yes, 999, and the Refill ability is only there on the off chance you clear out a stack of 999 mid-fight as a convenience. It was more necessary when the max was 99. (5) Nearly every bow is a CRP recipe, and all arrows are CRP, so if you want gathering and crafting to support your ARC/BRD, go with CRP and BTN.