A few random observations.
In the abstract I like that you've thought to put in ranged as an option, but it looks difficult to make LD work well for ranged in practice. For instance, the Epic Strike, Dire Shot, is feeble compared to Fatesinger's Pluck of a String. The Mantle, as someone else pointed out, is unhelpful for ranged. As you go up to t4 and t5 Dire Shot gets more useful, but what archer can invest that many points into LD when it offers so little otherwise?
One focus of the Destiny - enhancing Action Boosts - could work, except that most of them require the mantle, which is not especially helpful for ranged builds. So, you have to sacrifice a more useful mantle for a must less useful one in order to boost Action Boosts? Perhaps if you made the Mantle-Action Boost benefits trigger on Multi-Shot (probably with a cooldown between procs), like Displacement in Horizon Walker, it would encourage archers to use the Destiny. That doesn't help xbow users and throwers, though.
elvesunited suggested decoupling Action Boosts from the Mantle entirely, which would be even better.
Another attack enhancement, Strike with Fear is interesting, but only one stack of vulnerable? As in 1% more damage for 3 seconds vulnerable? If so, for a t4 enhancement that's underwhelming. If it could build several stacks, or some other effect like adding/extending Fear spell's slow effect, or less desirable, Shaken, maybe then?
Thanks for reading.