I've had the game since release but been tied up with other games and just now starting to play this. I'm curious though, about how many different skills should I invest perks into? I have both DLCs if that matters.

So far: (Only level 5)
One-Hand
Archery
Heavy Armor (I know this is strange to use along with sneak, but I picked this as I don't like the look of the higher-end light armors, bad choice, should I go light?)
Sneak
Smithing
*I was thinking about investing in Restoration as well, but not sure if that's worth it.*

I want to be fully invested in a few skill-sets as opposed to a 'jack of all trades.'


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A few other questions:

Is there a certain ratio I should use to level my Health/Stamina, so far I've went 2:1.
Is sword/board better than dual wielding?
What magic schools come in handy, or should I not invest in any if I focus on One-Hand?

Looks a decent set for a warrior who sneaks (get the Muffle perk for Sneak and your heavy armour won't matter). Restoration is good but you don't need it, just use potions you buy/make

2:1 is a decent health to stamina ratio. You could get by with less but if you want to sprint or carry lots its useful to have more than the base 100.
S&B is very good defensively, dual wielding does a lot of damage but you can't block when using it. If you go S&B add Block to the skills you need to develop
You certainly don't need Destruction with One-Handed and Archery. Conjuration might be useful for a meat shield but I'd suggest concentrating on a few skills rather than spreading yourself thinly