Mobs don't make them. We do.
Mobs do enough damage, that if you are hit, you will almost always fail.
Idea: Use some sort of scaling to increase our concentration check bonus.
For example:
1. Just double the total number
2. Double the ranks. Bonus would look like: (Ranks X 2) + mods
3. Add total caster levels. Bonus would look like: Ranks + mods + caster level
--- this would include multiclass as well. i.e. 13cleric/1 sorc would count as 14
4. Some sort of combo of the above.
This would mostly benifit the slower casters like clerics and wizards.
Yes, I realize you can take quicken (I have). I do not believe that this would result in 100% success on concentration checks like quicken does. Nor would it speed up casting, so I believe quicken would still have value.
Thanks!