In the context of Armor Stat Rolls, it would be great to understand the following:
Can you raise Armor Rating of armor or Firepower of weapon? Or will we have to roll those perfectly?
You have to roll them perfectly.
However when you level up an item you'll loose some levels on the attributes, the values will remain more or less the same but because there is new possible maximum value to achieve the whole thing is shifting.
Does it mean there are no reason to level legendries we got form demo as you will end with lower attributes on them after leveling?
Also when you level item does weapon rating re-rolled during level up?
No, upgrading the legendary items is always beneficial. Your attribute level may drop from 6 to 5 but the value remains the same and you can increase it again to 6 to reach new maximum.
No ratings is not reroled, it's increased proportionally.
How much are those costs? Or does it go up as the itme level goes up? And in that case roughly how much does it cost at tier 10-15? Will we need dozens/hundreds/thousands of shards?
Costs scale with levels, max level items should costs few hundreds of shards to level up to the maximum.
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