RE: How many pins do you prefer??
I just added a 5th pin to my Viper. I'm no sharpshooter....but I've read that 75% of your practice time should be spent shooting 2 times the distance you think you'll be shooting in the field.
So....I figure my max effective range (in a great situation) is 30 yds on a live animal. That means I need to practce from 60yds (It's 62 yds from the corner of my patio to the corner of my lot....where I have stakes for my 3D buck.
I just like hunting with the same sight I use for practice/3D.