This is the forum for helping you out if you're stuck or if you want to discuss the nitty gritty details of the dungeons within Mount Grimrock. Warning: forum contains spoilers!
I want to create a party with one dodge rogue in the front and a rogue dps in the back with assassination and daggers but I'm not sure if it's a good idea. Do I get enough good daggers for this? Another option would be to have the rogue in the back use missile weapons but then I will miss out on backstabs. Since I was planning to use an ice mage, I figured I could do a freeze + backstab combo. I know unarmed is a good option but I simply don't think it's fun, so don't bother mentioning it.
Backstabs are kinda overkill. If you have enough room to manoeuvre for backstabs you would probably win that fight without them easily enough anyway . It is a nice bonus for a back row assassination rogue but I would not spend points there for a front rower. Also those 2 better daggers are somewhat nicely hidden so be sure not to miss them if you decide to go for dagger rogues.
If you love backstabbing, you can go with two frostmages, one of them later skilled in air for damage and invisibility, the other for higher frost, so that the freeze lasts longer. But you have often not the space for backstabbing.
SpoilerShow
And you will find only one good dagger in the game.
The other option is to go one dagger rogue and one unarmed rogue. In fact, I would say that a frontline unarmed rogue is generally superior to a dagger one.
It's better not to double up on a single weapon type. While there are enough daggers by the end of the game to have plenty to go around, the best weapons don't have duplicates. I'd also suggest using an Unarmed Combat rogue rather than a second dagger user.