"Forget it, let's stick to fifteen marks. Since Victor is confident about achieving fifteen, if Holy Infant just pushes himself a bit harder, it should be doable. He is still far from the limit of his spiritual force. If I can find a suitable Truth Oddity for him in the ancient tower, I could further enhance his aptitude."
In truth, Levi's concerns are those of a top-level genius. Ordinary primordial soul wizards don't even have the luxury of such choices and wouldn't dare entertain these thoughts. For them, pushing their luck to barely meet the nine-mark minimum standard for promotion would already be something to celebrate. Twelve marks, let alone fifteen, is unimaginable for them. Even Hundred Flowers and Triss ascended with twelve marks.