Sunbreaker isn't a supportive super, although removing the tether would make shadow shot non-supportive as well. But keep in mind, shadow shot has minimal travel time, and hunter already has 2 roaming supers.
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Hammers have minimal travel time, anyone who thinks they are slow is delusional. Regardless, HoS has too much time and frankly the splash damage makes it a little ridiculous. While altering 1-2 of the perks would make it balanced, thinking that it wouldn't be the same as what he mentioned is an ignorant statement.
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They aren't "slow" but they're still easier to dodge than an arrow.