This is a script from one of my mods it's attached to a spell, but you should be able to change it to work for you.
This is untested, but I think it's at least close to what you want.
Scriptname FR_AelaTheHuntress extends activemagiceffect
ObjectReference property AelaTheHuntressREF auto
Quest property questnamebelow Auto
Event OnEffectFinish(Actor target, Actor caster)
AelaTheHuntressREF.MoveTo(Game.GetPlayer(), 120 * Math.Sin(Game.GetPlayer().GetAngleZ()), 120 * Math.Cos(Game.GetPlayer().GetAngleZ()), Game.GetPlayer().GetHeight() + 2)
Change AelaTheHuntressREF to who ever you want to teleport.
Change game.getplayer to the marker reference.
Change SideQuestProperty to your quest.
Don't forget to set them in the script property or it won't work.
The math part the moveto line will set the teleported npc slightly infront of and a bit above the marker, so you'll want to play around with hte number.
Placeatme just create clones instead of moving who you want.