Well, Archery seems to be an in-combat skill, since the player sacrifices speed in order to shoot more accurately, while Sneak Attack is a pre-combat action.
Out of combat, I'd let players use Sneak Attack as it is, i.e. granting a free attack before the start of combat with +5 damage, with two or three succesful Stealth checks as a prerequisite.
In combat, I'm not sure whether I'd even allow Sneak Attack, at all. Combat in my view of SoE is a quick, messy and violent business. After a character has executed a Sneak Attack, there probably is no way for them to escape their opponents' view in the less than 10 seconds acombat usually takes. Well, maybe with a 10 on their Stealth check...
How would you handle it?
Depends on the players, moment and atmosphere
But again, personaly, with my players, I would take everything into account (because my players like bonuses/penalties trough logical and reality based explanations).
First let's take into account that there are more Sneak Attack situtations:
Pre-Combat and In-Combat.
Pre-Combat:
Stealth vs Percpeption contest, ofc +/- bonuses and penalties from:
- Advantage and Disadvantage
- Penalty from low health/ilness
- Circumnstance bonuses/penalties (terrain, sound, vision etc.)
If I see that the favors go way ahead (like cca. +5 or more without dice) against the NPC, i would ask just 1 roll from the PC (or 2 for a more tense and dramatical scene in case he gets "critical failure" or/and a Luck/Intution roll in case the guards "coincidently" senses the PC) and visa-versa in all variants.
If th PC succeeds in the attempt, i would give him ALL the bonuses and penalties for the shot, take all from above again but include:
- Target moving, running or standing
- Way + Ambush (i count that as a offensive attitude) + Archery + Weapon dmg
And if it hits against Defense Rate,
Success Margin + Sneak Attack 5 dmg - Protection Rate = Damage points
In-Combat: Again, debatable
The only thing i don't understand is why, Archery (why is it in the "Close Combat" Domain anyway?), Sneak Attack and Mounted Combat aren't Disciplines for the Shooting and Throwing Domain? It seems that there will be very enough things to houserule for me and my players
