Erentil has essentially left it's category as a midrange weapon. As well as making primary gunfights almost pointless.
It's range has far exceeded what should be reasonable for a fusion rifle with such a tight bolt spread and reasonable recoil.
It's charge rate, which should be the slowest (and require timing/planning) is a non-issue when faced with most primaries, and closing the distance with a shotgun is... Hit or miss, no pun intended (looking at you, pellet spread.)
Nevermind the sad state of a sidearm against the charge rate.
It needs adjusting, either the range needs reigned in, or the charge rate needs a rework to be longer, or even just adjust the bolt spread at range to decrease the instances of "Mapping" guardians with it from a range that's entirely unreasonable.
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The only real issue I see with it is back up plan. Once you learn to not just rush them, you can counter it somewhat well.