Of course, before submerging Lefaux with her toxin-ridden, mistified pink blood, One needed to get to the top of this tower… On her own, she wouldn't be able to do it without being spotted and raising an alarm. She just wasn't equipped with the proper means to go around stealthily, which is why she was accompanied by Maliah.
One could have benefited from Sweet Holli's invisibility as well, but it had been decided to make use of the greatest stealth user of the group to place a riskier array in a remote place to really maximise the damage the pink fog would result in–Also, Maliah could do something very useful while carrying the vampiress, which was climb the tower from the outside instead of having to go in and have to get past a whole lot of people.
