I have searched for this I promise and could not find anything. I am wanting to start a VL as a Thief/Archer, but my question is, how do you counter the no Stam regen? Do you just only go out at night?

Pretty much, you just rest until around 7:45 then rise fully rested and go do your thing then head back to your preferred haven and do it again. While I have no sun damage my chat is entirely nocturnal even resting in caves when the sun cateches me out while travelling around.

Potions of Restore Stamina. As long as you're careful, you'll be able to manage this, but... honestly man, if you're trying to be a vampire and out doing things during the day... are you sure you should be a vampire?

Sun goes down at 7:00 PM and rises at 5:00. That's your window for outdoor activities if you want your regen to be working.

In VL from you can't counter the stamina regen, but in normal form as a vampire you can use enchantments or/and the wind walker light armor perk.

But as others have said, darkness is where your true strength lies as a vampire.

You can get a restoration perk that makes using restoration spells refill stamina (Not really a thief/archer skill..but its always nice to have...the refilling of stamina will make leveling it a bit faster)..that is what most people do then they just find items like the Vampire artifacts..that give massive buffs to magicka and magicka regen.

Good Magicka regen items force vampires in the day to regen..so yeah.

Vampires admittedly shine brightest when its dark out...lol, when the sun is out you have to have a lot of potions or the perk and item combo I mentioned before.

Vampire Lords are blatantly overpowered when its night time, I love it though.

As vampire, use a ring of invigoration = stam regen or an amulet and take the light armor perk unlocked at skill-level 60 about stam regen when wearing 4 pieces of light armor. The. You will have a decent stam regen even outside on midday.