Some weapons archetypes just don't work PvE. Finding one that does work it too much work. The worst thing you can do is force someone into a meta they dislike. I hate scouts, sidearms, shotguns, snipers, pulse rifles not Graviton in PvE. Stop dictating how to have fun.
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More sensible solution : Change champion mods and other ways to deal with champions to be optional power boosts instead of must use. You don't get restricted on using whatever you want but switching to that loadout improves your performance