lol if you're at a point in the game where you've made hundreds of frag mines I can't imagine you're really needing to use Create Trap on a regular basis anyway
i don't even take the perk i just take cannibalism instead and just butcher things with my halberd/bow instead and make the meat into money i have 3.5 million in the bank i need to make about 700k or so to be back to the wealth i was at
