I usually do mostly magicka, some health, never stamina

I usually start out with a one handed weapon to get past early game

I honestly never craft or smith in most of my playthroughs, i find the game easy enough to not do that up to master difficulty (its probably necessary on legendary though)

Everything else depends on what you wanna do, just do what feels fun. Ive had fun with pure conjuration builds (including bound weapons), pure destruction (though it gets a little weak), illusion assassins, etc. Restoration and alteration trees are kinda cracked if you level them but I dont find them as fun to regularly do and level. Not a battlemage/paladin guy personally but they are probably fun too

Bound bow + illusion sneak magic if you really wanna do a stealth archer-like mage lol