I am starting a campaign and I need some help.

Will a party of a Paladin and two Archer/Rangers work well, or will they have trouble with encounters of appropriate challenge rating?

Major Concerns:

• Though the party has some magic I don't know if they have enough to contend with magic users of appropriate levels.

• I am not sure if they will be able to deal enough damage in close quarters.

• There isn't much in the way of stealth.

Edits: I'm trying to workshop this into a better question, so as this campaign picks up I'll be able to ask better questions in the future please let me know how I can do better.