So no, the archer will never die. They're just slower at working up a spawn. Gotcha. They could always go a little deeper into chiv and spam holy light a bit if they cared, but they don't.
If you insist wanting to use ABC archer as your main spawner... then dont bother with holylight.
1. You wont have the FC/FCR required to use it effectively (unless you sacrifice your dexer mods). Sampires do not need to sacrifice anything. Its nice if you pick up FC but most sampires will agree that its not needed.
2. HL does laughable damage, anything bigger than a slime or mongbat its not worth using. Samurai's WW with hit area can proc up to 9 times per target per swing... and depending on the initial damage you dealt on WW per target, but on average hit spell WILL out damage HL very easily (by at least 9 time or 900%). So HL will never ever out damage sampires... actually not even close even if we assume you can HL indefinitely.
3. You wont have wraith form to keep your mana up like samurai can indifinitely spam WW with hit area.
4. The best ABC archer is an ABC thrower. Wammy thrower owns wammy archers in single target DPS, and if you do your suit right, they WILL out damage melee sampires vs single target in dps.
Last but not least dont bother with HL, simply use a hit area magical short make sure you can cap out your 300% DI at all time. You can mix your lighting shot (semi-aoe) with momentous strike (YES it works for archery as long as you are at melee range to the mobs you are attacking)... you will do just fine in most spawns.
Well there that's everything you need to know about your character (I assumed its ABC/Wammy Archer).