Psychologically-speaking, I actually would understand Lisa spamming Beelzebub out of her contracts. Satan got her into this mess, he's the one who plotted her assault, the other Baba Yaga souls probably have similar stories. Asmodeus perpetuates Lust. She may not prefer the overt sexualization side of lust, but she still exists in it. She has no problem with rape, which is likely a trigger button for Lisa (a personal one, not so much that Lisa wouldn't tolerate it for her plans, she was clearly aiming for it to happen during Hell on Earth) and whatever contracted power she offers most likely would play to this carnal lust that I could see Lisa having some apprehensions towards wielding. Beelzebub is... well, he's pretty dining table themed. He fries people, he flies, he skewers them. Certainly gory, but nothing I could see Lisa having a personal skin-crawl moment for (except maybe burning, but Lisa didn't seem that bothered at the stake anyhow). If anything he's the only contract where Lisa was really using the demons back, if they used her, like she said they would. He got his refresh during her plans, she took a fragment from him and kicked him out of eastern Europe for whatever reason. She's the traumatizer in that relationship, the one where she's closest to an equal. Not really comforting so much as just on better grounds than the others. It's just very funny that Lisa's options for contracts are rapist, rape-planner, and cannibal groomer, and it's far and away the cannibal groomer that she may be the least personally turned off from.