Actually, if you look at Jester's post above, you'll see that in 1E only weapon attacks were effective in destroying the Mirror Image images.
And actually, I said as much myself...

I was conflating the 1Ed and 2Ed rules there.
Illusions can still suck up spells - if you try to cast a spell that targets a creature on it, you lose the spell.
With radically different effects from the earlier editions.
Anything that creates an Effect - Scorching Ray, Acid Arrow, etc - works just fine. Anything that affects an Area - Fireball, Lightning Bolt, etc - works just fine.
Not when the warriors are engaged in melee with their "foe."