That question is going to get you a hundred different answers.
Depends on what kind of bowhunter you are. If you're like most, and pull your bow out about 2 weeks before season and shoot at 20 and 30 to make sure you can still hit a pie plate, you're doing the deer, or any critter for that matter, a disservice to shoot anything but a mechanical. Bows are a lot better than they used to be, but it still takes time to tune your broadheads.
It's been said, some people don't care for Rage BH's, but I've been shooting them since they came out and can honestly say I haven't lost a deer since. https://youtu.be/uq0tBctfbaEhttps://youtu.be/AORna4in7JU
I'm leaving for Idaho tomorrow, and unfortunately you can't shoot mechanicals there, so I'll be shooting the Trophy Taker Shuttle T's. They tuned easy and are flying awesome at 70 yards. Hopefully I'll be able to comment on their killing ability when I get back. Last year I shot my bull with a Muzzy Trocar. He died, but he ran a while, probably more shot placement than anything, but that made me lose confidence in the Trocars.https://youtu.be/0uyr7VhFaKE
It's all about the confidence you have in your equipment. Shoot as many as you need to until you find one that kills the way you want it to. Devastating and quick. I've found that in Rage BH's for mechanicals where legal, but I'm still looking for a fixed head I like. Hopefully the Shuttle T's will do it for me this year. Good luck to you.