You're looking for either a Dark Elf or High Elf army then
A low chance of breaking/fleeing - Leadership 8-10
A mid to low model count - yep
Take a hit while they get up front - A fast moving Dark Elf army (dark riders as core, hydras, shades, manticores) is on your opponent in turn 2 so only needs to suck up 1 turn of shooting. The uber High Elf lists are a bit slower but have units that can take the beating (Phoenix Guard for example)
Get up front fast - See above for Dark Elves, High Elf infantry is pretty nippy compared to everything else
A solid ranged option (just one to get at targets hard to reach in melee) - Bolt Throwers, Crossbowmen/Archers, and some of the best magic in the game.
The best movement/placement options. Able to get where they need to be quickly and dictate when and where combat will happen - Again Dark Riders, though Dragon Princes are rock hard in a high elf army and H.elves get 50% more special choices.
Good defenses vs magic. D.Elfs have the ring of hotek, this can and will lock down the magic phase entirely if you use it right H.elves can have MR3 MR2 MR1 Total immunity to magic, a 2+ward save against all wounds caused by magic and Teclis to spread around their units.
Edited: Red text is for mod use only - squeek
Last edited by squeek; 04-20-09 at 09:14 AM.