If you want to multiclass, I would recommend a level of Cleric, either Tempest (rebuke is fine, and fog cloud can help with hiding) or War (extra attacks are very very nice, and Shield of Faith is a nice spell). That way, you can get all of the weapons and armor, you get healing spells and Bless, but mostly, you get more spells per day.
If you take a race that gets the longbow as a weapon, then you could take any of the Cleric domains.
Code:
Lvl, Rogue vs. Multiclass, number of extra spells per day
1 0 0 0 0 2 0 0 0 0 2
2 0 0 0 0 2 0 0 0 0 2
3 2 0 0 0 3 0 0 0 0 1
4 3 0 0 0 3 0 0 0 0 0 Cleric/Rogue gains first arcane spell (1 level late)
5 3 0 0 0 4 2 0 0 0 3 Cleric/Rogue can gain a 2nd level arcane spell (2 levels early)
6 3 0 0 0 4 2 0 0 0 3
7 4 2 0 0 4 3 0 0 0 1
8 4 2 0 0 4 3 0 0 0 1
9 4 2 0 0 4 3 2 0 0 3 Cleric/Rogue can gain a 3rd level arcane spell (4 levels early)
10 4 3 0 0 4 3 2 0 0 2
11 4 3 0 0 4 3 3 0 0 3
12 4 3 0 0 4 3 3 0 0 3
13 4 3 2 0 4 3 3 1 0 2
14 4 3 2 0 4 3 3 1 0 2 Cleric/Rogue can gain a 4th level arcane spell (6 levels early)
15 4 3 2 0 4 3 3 2 0 3
16 4 3 3 0 4 3 3 2 0 2
17 4 3 3 0 4 3 3 3 1 4 Cleric/Rogue can gain a 5th level spell (normally, they cannot)
18 4 3 3 0 4 3 3 3 1 4
19 4 3 3 1 4 3 3 3 2 4
20 4 3 3 1 4 3 3 3 2 4 Cleric/Rogue can gain a 5th level spell (normally, they cannot)
The armor for a Cleric 1 / Rogue 4 of choice is a breastplate. This gives AC 16, AC 18 with a shield. And it still allows the Rogue to stealth without penalty. The weapon of choice is either Rapier or Longbow.
At levels 5, 9, 14, 17, and 20 (see table above), Cleric 1 / Rogue X gains the option of obtaining a higher level spell than normal, levels earlier than they normally could. As an example, the Rogue could get Hypnotic Pattern at level 9 (having a low Int is not terrible for this since there is only a single saving throw). Granted, he might want to use his level 9 spell gain (Rogue level 8) for a non-illusion, non-enchantment spell.
If you start out with Wis 14, you get 3 cleric spells prepped per day for the lifetime of the PC. I would recommend Wis 14 instead of Wis 13. The extra prepped spell and +1 to DC and for spell hits is worth it. But, these spells can be changed up, and they can be cast in higher level slots. For example, a Cleric 1 / Rogue 4 could cast Cure Wounds in a second level slot.
You cannot get sneak attack damage with your cantrips since they are not ranged weapons, but that's not the point of the build. Cantrips are for doing special stuff (Guidance, Light, Thaumaturgy), not for attacking with using this build. And because the PC is multiclassing, he does 1D6 less sneak attack damage every other level and gets rogue abilities one level later. But, the extra spells and better AC sort of makes up for that. The PC can Bless himself and with hiding/advantaged attacks, rarely misses.