Bear in mind that in these games, you don't really HAVE to plan a spec. Just play the way you want to play, and see which perks you unlock. Perks have skill level requirements so you CAN'T perk skills you aren't really using.
The exception to that would be alchemy, smithing and enchanting... since those are out of combat activities which you have to pretty much decide to do (or not). All three can be very useful... personally I love alchemy and can't imagine playing any kind of char without it, but smithing and enchanting are also very powerful.
Some of your choices aren't really compatible. For instance, if you sneak everywhere and take down your enemies with bows before they get to you... which is a very enjoyable playstyle... your light armor is not going to raise much, since you will rarely get hit. But that's ok, since you'll hardly need it
