stonegod said:
In melee, at comparable level, the images will be down in about 2 rounds if you stay still on average---they are really easy to hit. However, the main thing to keep in mind is that the mirror images do nothing if your attacker
- Just closes their eyes (and take the 50% blindness chance)
- Has scent, tremorsense, blindsight, or blindsense.
- Dispels it (as the mirror image spell can be targeted directly)
So, its a good defense, but not perfect.
That's all true. But if your enemy closes their eyes, it upgrades your Mirror Image spell to Improved Invisibility - to some extent. I'm quite happy with that.
The images will only go down in 2 rounds if something is full attacking with 3+ attacks. Obviously, if your wizard is in melee range, move away. And if something is ineffectually attacking your images, well... that's ok. Cast it again and let your friends beat on the enemy. It's just a 2nd level spell; pretty small sacrifice. Plus, of course, you are not taking damage while the enemy is using up actions.
Usually your wizzie isn't in melee range from the first round on. But if he is, you will be happy you are Mirror Imaged!
Vs. a bunch of archers it is usually (not always) effective because the archers will avoid shooting the useless images instead of targeting other PC's who are easier to hit.
Scent, tremorsense, etc. are pretty rare. Scent does not help that much.
Dispelling: if they use a 3rd level spell to dispel it, recast it. You are trading 2 for 3, and they are not doing any real damage. Keeping the enemy NPC wizzie busy dispelling a 2nd level spell is completely useful!
No, of course Mirror Image is not a "I win" button - thank god.
You can get around it. You forgot to mention "True Seeing". Pretty much overkill, but...it works.
But 95% of the time, the enemy will see the wizzie with a bunch of images, and other PC's without a bunch of images, and.... target their precious attacks against a PC they have a good chance of actually hitting.
That's the real benefit.
The enemies know their actions are precious; they are not going to squander a charge, or a Hold Person, or a round of arrows on a Mirror Imaged PC. It's stupid. Might as well target something you KNOW can be hit without a miss chance.
This does not work as well against mindless critters. But against mindless critters, you have a LOT of other things to do!