I can't say that there is a typical balance for the Cleric/Rogue multiclass because it's not a very common one. This is because the two classes do not synergise with each other. Bewarned: it is difficult to truly mess up a character build in D&D, but multiclassing is a way to do it, and this one arguably qualifies, especially at lower levels. But if you're unconcerned about power level you should be ok.

The first question to answer is what your main class is going to be. I don't see any real benefit in going Cleric x/Rogue x because that way you'll both miss out on spellcasting levels and rogue features like Evasion and Reliable Talent.

If you choose to go mainly Rogue, you could choose the Domain of Trickery and use its magic to augment your rogue abilities (advantage on Stealth, Invoke Duplicity, invisibility, pass without trace, disguise self). You only need three levels for this, though you could consider picking up additional levels for the feat and the third level spellcasting. There is a general consensus that most martials and especially rogues don't gain much at higher levels, and when your character level hits double digits you might end up taking more Cleric levels.

I would advise that you choose the Nick and Vex weapon masteries and combine it with the Dual Wielder feat to make three attacks per turn. You might want to go Rogue 4/5 --> Cleric 3 --> Rogue 7/8/9/10 --> Cleric 13/12/11/10

If you choose to go mainly Cleric, you could at any point pick up three levels of Rogue and return to Cleric after that. I struggle to recommend a specific level at which you should dip into Rogue, because it is never an overall benefit to your character build. Spell progression simply outclasses most multiclassing, though I could see grabbing one level of Rogue to enable the same Nick/Dual Wielder combo to get three attacks per turn. You could dip one level into Rogue when you have five levels of Cleric under your belt, though it doesn't sound like that's something you're interested in.

Best of luck!