If you really do something ridiculous like 10 cleric/10 wizard then you might find yourself denied from public groups.

Other than 10/10 splits people are usually pretty accommodating with multiclass builds.

The ddo forums and ddovault have lots of builds for you to look at.

Right now I'm trying shuriken thrower 13 rogue/6 ranger/1 monk...should be interesting when update arrives

I rarely see builds that are 10/10 split terron im sure you don't either but I agree with your post im working on a 15/3/2 build 100ac barb with evasion