brehobit said:#2b If the baddies are adjusting all of their stratagy to deal with mirror image (a 2nd level spell) even at high levels I think the spell might be too powerful.
Mirror Image is very useful.
But, the baddies should adjust their strategy for any very useful spell.
For example, Greater Invisibility. Much more potent than Mirror Image because you can cast and then move and the miss chance climbs up near 100% for the entire combat as long as you stay more than 20 feet away from your foes (unless a foe has See Invisible or some other mechanism to find a hidden opponent).
And although Mirror Images miss chance can be as high as 89%, it drops pretty quickly once the caster is actually hit (i.e. it drops to 0% for anyone who was paying attention until the Wizard's next action). Even with 8 images, the odds of not hitting the caster at all at higher level (assuming that each attack hits an image instead) are:
1 89%
2 78% (89% * 88.75%)
3 67% (78% * 86%)
4 56% (67% * 83%)
5 45% (56% * 80%)
6 34% (45% * 75%)
So with the maximum 8 images up (which only happens 25% of the time at 12th level), a higher level Wizard has only one chance in three of not getting hit at all if two enemy ranged weapon opponents target him with 3 attacks per round each (give or take, the odds are slightly better than this due to the ranged weapon opponents missing the images as well).
An enemy spell caster merely needs to Ready an action to target the Mirror Imaged caster when anyone actually hits him and if his entire team is targeting the Wizard, it is good odds that the enemy spell caster can target him within a single round.
PS. The odds of hitting the Wizard increase fairly dramatically if a melee Fighter is willing to shut his eyes while doing a full round attack since he cannot hit an image by accident:
1 50%
2 25% (50% * 50%)
3 12.5% (25% * 50%)
Granted, the Fighter might lose his Dex bonus to AC and could get sneak attacked doing this, but this might not be a problem for a Fighter with the Blind Fight feat (depending on how a DM rules Blind versus Invisible).
Last edited: