As long as you put the work in, I believe you should be able to dev/apply to have the armor upgraded from Normal to Ultra rarity.
I mean, I feel like devving to have something's rarity raised shouldn't be too difficult, when they literally gave away items prior that would raise any weapon to Ultra Rarity if consumed, due to an event that happened.
But yeah, I personally wouldn't recommend making Arcanium armor, unless you're devving it for a Unique. Nyeshk gives more vit, is more plentiful, and is almost better in every single way, short of the 5% CDR drop via weight.
Weight is currently -0.001% CDR per weight, so with 1000 weight, you'll lose 1% CDR(7 agi of CDR). A Nyeshk Chestplate is +9 vit, +55 Weight, the Leggings, +5 vit, +20 weight. For a total of +14 vit, -0.075% CDR. Arcanium is +11 Vit, -0.025% CDR.
Addendum: After doing some quick testing, Weight's tooltip is indeed incorrect. It does adjust at the rate of -0.1% CDR per weight it seems. So, it's the difference of +14 Vit with -7.5% CDR with Nyeshk, and +11 Vit with -2.5% CDR with Arcanium. The Equivalent of adding losing/gaining 3 seconds of Cooldown on a 60 second CD skill.
So, not as enviable as previously stated, but my point still stands. Use Arcanium for uniques/devved items, you're purposefully kicking yourself in the ass by choosing to craft a basic set of Arc armor to hope for a Rare/Ultra roll. Nyeshk or even Mythril is just a far more viable option for the sake of rerolling.
I mean, I feel like devving to have something's rarity raised shouldn't be too difficult, when they literally gave away items prior that would raise any weapon to Ultra Rarity if consumed, due to an event that happened.
But yeah, I personally wouldn't recommend making Arcanium armor, unless you're devving it for a Unique. Nyeshk gives more vit, is more plentiful, and is almost better in every single way, short of the 5% CDR drop via weight.
Weight is currently -0.001% CDR per weight, so with 1000 weight, you'll lose 1% CDR(7 agi of CDR). A Nyeshk Chestplate is +9 vit, +55 Weight, the Leggings, +5 vit, +20 weight. For a total of +14 vit, -0.075% CDR. Arcanium is +11 Vit, -0.025% CDR.
Addendum: After doing some quick testing, Weight's tooltip is indeed incorrect. It does adjust at the rate of -0.1% CDR per weight it seems. So, it's the difference of +14 Vit with -7.5% CDR with Nyeshk, and +11 Vit with -2.5% CDR with Arcanium. The Equivalent of adding losing/gaining 3 seconds of Cooldown on a 60 second CD skill.
So, not as enviable as previously stated, but my point still stands. Use Arcanium for uniques/devved items, you're purposefully kicking yourself in the ass by choosing to craft a basic set of Arc armor to hope for a Rare/Ultra roll. Nyeshk or even Mythril is just a far more viable option for the sake of rerolling.