Found a nice weapon but

[Lyrick]

I'm a troll monk who's already got UC level 9, but

N - a crude mace

turns out to be

N - the +10, +11 mace "Huejyqo" {drain, *Rage, rC+}

Their aptitude for maces isn't TOO bad. Should I switch?

I'm using it as my weapon while training Unarmed Combat anyway. Its felling pretty much everything.

Is the random rage going to be a problem?

[nago]

The enchantment level is much less important than the base type of the weapon - a +11 mace can a good weapon for the first part of the game (by sense up Lair I'd dare to say, but fsim test would be necessary), but later, with m&f skill increasing, it would be outclassed by bigger weapons (e.g. dire flail, great mace).

Furthermore, troll's claws are among the deadliest weapons in the game - surely far better than a +11 mace.

Finally. *rage usually doesn't seem a problem, until it triggers in a inappropriate turn and kill your character.

So, don't switch.