Actually, it doesn't matter. When I look at the strengthened synapses page, and how many skill points the 9th - 12th mutations cost to unlock... I'll have to level up like 25 freakin times anyway. I'm sure I'll pick up enough mutagens. Granted, I'm level 70 now and haven't started any new quests yet after the first main quest (and I will probly use the SetXP mod to get max the amount)... I still don't see that happening.