In AC:B you unlocked improvements to your powers by unlocking challenges. In AC:R you can craft abilities once you're level 30 instead.
However some high level players (prestiged at least once I think) seem to be able to use smoke bombs insanely fast - I've been smoked twice in less than 30 seconds by the same player several times. This is significantly quicker than I can craft.
Do you get additional crafting options once you prestige?
Am I missing some combination of perks that gives you the ability again in less than 30 seconds?