I've run VMA over that past several years and happened to tracked my all my drops. I've read people asking about drop rates and thought I would share mine. This is the result of 116 runs. It has more weapons because of multi-drops (i.e. duel wield & S&B), leaderboard drops, as well as double drop Wrothgar events. Most of these runs are back when duel wield dropped dagger/axe combos only so no surprise these are my highest numbers. Bows and lightning come in highest for the single drop weapons.

Weapon - #Drops- Percent
dagger - 23 - 14.4%
axe - 19 - 11.9%
bow - 18 - 11.3%
lighting - 17 - 10.6%
2h sword - 12 - 7.5%
resto staff - 11 -6.9%
2h axe - 10 - 6.3%
inferno - 10 - 6.3%
ice staff - 9 - 5.6%
shield - 9 - 5.6%
sword - 9 - 5.6%
mace - 8 - 5.0%
2h maul - 5 - 3.1%
Total - 160- 100.0%

Enjoy,
LywtW8