It's a bad idea if you don't imbue it. It's only good if you keep the attack style on slash, and even then there isn't a noticeable difference in accuracy. It's not a bad idea to bring it, it's just not that good of a ring.
I recommend berserker ring imbued. It's the best ring for what you're doing.
Reason for this is because the usual NMZ booster monsters ull get are:
The Kendal (bear-man thingy) -> weakness against stab
Bouncer (hellhound) -> weakness against stab
Count Draynor (vampire) -> weakness is a 'stave' so all attacks are irrelevant (even though a stave can be used for mainly stabbing/slashing in real life)
Tree Spirit (...tree spirit...) -> weakness is against fire spells (irrelevant)
Khazard Warlord (man with platebody-armour) -> weak against crush or spells (irrelevant)
Black Demon (demon) -> weak against slash, Silverlight/Darklight, holy-water and spells.
Overall, 2 out of 5/6 monsters are weak against stab, 1 out of 5/6 monsters are weak against crush., and 1 out of 5/6 monsters have a weakness against slash.