Yes, the good ol' Dk controversy again

The only other maps I know of that Spears are better at are:
Birks
Black Kents
Gobies up to a certain point
Dragon Turtles
Wyvern

Anyways, you can't really make up the lack of speed for Crusher.
If you used a Normal(6) weapon, and compared it to a slow(7) weapon, you'd the difference would probably be an extra ~4 attacks in a minute?

Spears are better at newties and skeles and generally all of the best training spots. Using a sky ski is a noticably difference in attack, I don't know the exact numbers but the difference is very easy to feel.

For PAs to beat spears you need the uncommon large mob of 4+ and even then spears output more dps unless you have a mob of 5-6 which is even more uncommon.