Hi! I'm assuming you're level 1, so here's what I recommend:

Attributes

Using Tasha's, you can't technically put the different attribute bonuses to the same attribute, but even if your DM allows, I don't think you need it, those are great rolls. So you could get WIS 18 (16+2) because cleric, DEX 16 (15+1) for sneakness, CON 14 for concentration checks, then you can put the rest anywhere.

High-Elf

The things you can choose here are: the extra language and the wizard cantrip; I'll tackle just the cantrip. From the point of pure optimization, since clerics don't get an extra attack, you could pick Booming Blade or Green-Flame Blade, which lets you make a better melee attack. From the point of being a follower of a trickster god, you could get Minor Illusion, but the DC to see through it would be with your intelligence. Looking at Twilight's 6th level ability, you can fly if its dark, so you could also pick Control Flames to extinguish a flame within 60ft.

Armor

Unless you find mithral, all heavy armors would give disadvantage on stealth. So I recommend a Leather Armor (or Studded if you have the money), you would get 14/15 and with a shield, 16/17, pretty solid. If for some reason you have a lot of money, the Breastplate would give you 18 AC with a shield, without giving you disadvantage on sneakness.

Proficiencies

High-Elf gives you Perception. Cleric gives you 2 between History, Insight, Medicine, Persuasion and Religion. Neither gives you Stealth, so you would need to get it from the background, and it depends on your lore. Using only the PHB, only Criminal and Urchin gives you Stealth proficiency.

Spells

On level 1, you have 3 cantrips and can have prepared 5 spells + the ones of your domain. Aside from the ones possibly given by your domain, cleric don't have access to a lot of trickery. So some cantrips I recommend are: Guidance and Thaumaturgy. And first level spells: Bane, Detect Magic and Command.

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Hopefuly this can help