Space type magic is astonishingly powerful for assassination with the range he has. If he had deployed a fast-acting nerve agent like novichok (the Russians do it best) she would've been done for.
He could also set an anchor right outside her house and as soon as she leaves for work and steps over it, teleport her as desired.
@Nelson Mandela he could have put thr gas portal under her bed or furniture not hovering next to her head. He could have USED THR PORTAL ANCHOR AFIXED TO HER WORK DESK from last chapter to do the gass attack in gar. He could have poisoned her toothpaste or makeup in her house and been long gone when she died. If they want to teleport her without her knowledge they could just launch the whole bed the next time she's asleep.
