Overview
You wouldn’t typically expect a RF with a bamboo skill to be an effective generalist RF. Mosin Nagant decided she didn’t like that mindset and tried to become just that with her MOD.
With both of her Special Equipment, Mosin Nagant’s damage output is stronger than before. Her new skill, Pale Reaper, boosts her damage for 3 seconds when she kills with a normal shot, and boosts her Rate of Fire for 5 seconds when she kills with her Skill 1.
Sadly, in practice, this is not as effective as it once was. With a large variety of high HP enemies now being prevalent in the latest content, she struggles to kill these enemies with her Skill 1, and thus cannot consistently proc her Rate of Fire boost in many fights.
If you do upgrade her, bringing her to MOD2 will be sufficient. Her SPEQ is not worth the cost, even with the slightly higher Crit Rate it offers. MOD3 is not advised.
Mosin’s SPEQ-Set gives her Skill 1 a 1 second ICD and doubles its Damage against Elites, and also allows Skill 2 to stack up to 3 times. Both are nice boosts to make Mosin better at what she does, but are not necessary especially given Mosin’s already low priority for upgrade.