I feel like reverse curls don't help that much with peak building but do a great deal for upper forearm thickness and detail.
A lot of people say that the "peak" is genetic. I'm pretty sure that when your biceps peak is genetic, but if you get them big enough, eventually they'll develop the peaked shape. So there's not much strategy to forming a peak other than building bigger biceps.
Of course, this is where the genius of CT comes in. In order to make your bicep huge, you need to attack all the heads of the bicep. So in order to get the size you need to build a peak you should do 3 different types of exercises every time you train your biceps
1) A Wide Grip Curl or a Dumbbell Curl with Supination
2) A Close Grip Curl or a Dumbbell Hammer Curl
3) A Reverse Grip Curl or a Zottman Dumbbell Curl
And of course your arms won't grow if you don't train your grip. But that isn't a problem with all the pull-ups, shrugs*, rows, and Captain of Crushers you've been doing.
*If you're not doing some type of shrug and you're trying to peak your bicep, may god have mercy on your soul.