No, let the existing sacrifice grow for as long as you want. No candle pruning. You might want to strip off old needles if they shade out the bottom of the tree. You can also prune off side branches off the sacrifice. It's the apex bud that grows long and tall that puts on the wood.
But, you're going to eventually cut that off, right? So, pick the next leader that's going to be the next section of trunk after the first sacrifice is cut off. Let it grow out, too. It won't have near the vigor that the first sacrifice has until you chop the first one. But as soon as you cut the first one off, it will take over. The tree won't have to stimulate all the buds to find a new leader, it's already there, so it will continue growing. Which will help heal the scar you'll make when you do the first chop.
So, then, you choose what will be the leader after you will (evenually) chop the second sacrifice, and don't candle prune it...
Repeat as necessary over the next 10 years, and you will have a trunk with movement and taper. And meanwhile, you'll have low branches that HAVE been decandled, that you can train into the final design.