i. Armor has an allotted amount of durability per rank. Please refer to the guide below to find the base durability of your armor. E- 5 D- 15 C- 40 B- 80 A- 120 S- 175
ii. Armor A-rank and above have access to two abilities- armor below this rank only have access to one. Abilities cost 1,500 ryo each. Keep in mind that abilities are things such as chakra absorption and channeling certain chakra natures well- they are not a substitute for normal jutsu.
iii. Armor costs the same amount of EXP to obtain as a jutsu of the same rank. Ryo-wise, the item cost is equivalent to EXP cost x100.