[3.P] Tier System for monsters?

[ImperatorK]

What monsters would you put in what tiers?
Monsters are kinda like classes. Sure, they don't progress from 1st to 20th level, but they do differ in abilities and roles and obviously some are more powerful or versatile than others.

[JohnnyMayHymn]

What level are you putting each monster at? Ecl, cr, hd, by spell casting?

For example sharn is tier 1 at level 9 but not at party level 20

[veekie]

Using the same tiering doesn't quite seem right to me, since monsters by default have static spell and equipment lists, whereas extreme excellence in one department is going to be ripping a nice big hole in the party. So you'd be looking at built in wildcards like wish/miracle/Shadow [foo], extra actions, immunity to party members, and nasty lingering effects that take resources to remove even if you kill them.

[ImperatorK]

Level = CR.