Pretty much everything you say is based on your personal preference of how you like to play the game. It doesn't change the fact that this time around you can't top out all the abilities like you could in previous games. Yes you can make a hybrid capable of beating the game. Skyrim is not that hard. But if you break down your hybrid, none of the seperate parts will be as good as that of a pure character. Still functional yes, still able to beat the game yes, but not as powerful. It's numerically impossible. Even on pure characters I don't fill in all the trees as there aren't even enough points for that. I am still forced to pick and choose perks to optimize the class. I never get much above level 50 on any character and that's not a lot to spread around for a hybrid. I would like to see this hybrid build of yours. Why not post where you put your points to make this most powerful of all characters. I'm curious now. Also what level did you go to in order to get your points for it?
i like all 3 groups of skills, though, magic is by far my least favorite.
what i'm saying is that you DON'T need to get all of the high level skills to be all-powerful. you don't need to top them out. therefore, it only makes sense that the hybrid would be the most powerful.
i can start a run down of each skill and their perks:
archery= base x5 up to power shot, for sure, with quick shot and critical being great additions. bullseye is not worth it. firing another arrow is better.
block= tricky cuz it's bugged, but, base x1, shield and elemental are all you need. can add to base depending on whether your playstyle gets you to the max ac. all the bash perks do not add power. another 1-h/bow strike is better. plus, the default bash is good enough.
heavy vs light= i go light because it takes me 5 perks to get to deft. base x1 with additions depending on playstyle and how you get to max ac.
1-h vs 2-h= 1-h plus shield. base x5, fight stance and sav strike. that's it. the specific weapon types add very little xtra damage vs another regular swing. paralyze not better than more attacks and can be substituted with spell or potion.
sneak= basix1, backstab and deadly aim. can get assassin with muffle up to silence.
right there my hybrid is as powerful as can be without any magic, yet, and, it took about 20 perks.
the rest really depends on how you're going to play to reach the max ac. and, that's an important aspect to plan out because you will, obviously, be wasting perks.
i'll do magic later.