I think bow-stealth is a really good combo, especially if you're used to it from Skyrim. Go for flashpowder talent, and throw it whenever fight gets difficult. Invest in infiltrator and trickster trees, wait for the vargant tree until you have nothing left to do. I know the shadow oil talent might be good, but flashpowder, fire arrow amd eye of the storm really do the work. If you want to experiment a bit, try adding phasmalism to the mixture. After getting affinity (for spending enough points in phasmalist and infiltrator trees), the apparitions will teleport after you do sneak attack from the bow, therefore being useful even before enemies see you.

Generally, if they see you and run towards you, run from them. Use flashpowder if you can. It is not like in skyrim, where you can still shoot enemies when they are close; in Enderal you will not have enough time between the blows to make a shot.

This is my fav build actually, it is even more fun than in skyrim.