I know hybrid builds (in the sense of pointing points in and pooling both damage and buffs from both resources) have sucked since 1.6, so let's leave that there. I'm interested in those few who choose to play these builds anyway. When I made my first character, being a nightblade, at release this hybrid setup was always the idea behind him and so 1.6 was a very disappointing patch for me that ultimately led me to reroll.
Now I'm keen to play my hybrid nightblade again, gimp or not, I really loved the playstyle back in the day. My character's current setup is using 7/7 heavy armour with magicka/stam split down the middle, using a combination of dual wielding and sword/shield. One advantage to this playstyle is that resource management, even without any champion points spent is a non-issue, since siphoning attacks will keep both pools full almost always when you're balancing between stam/magicka attacks (whirlwind/sap essence spam is great, for example).
Anyone doing something similar I'd be interested to hear about your builds, particularly what you've done with your champion points, as it seems very difficult to hybridise these. The mage constellation in particular makes it difficult, with the straight +physical or +magic points. The options of +light/heavy attack damage in the atronach, and thaumaturge for the +dot damage are worth considering, however, for my build at least, light/heavy attacks and dots don't really do comparable damage to physical or magic. This leads to the pull towards choosing one of physical or magic to put points in, and ending up throwing the hybridisation thing out the door. An alternative would be to put points in both physical and magic equally, eschewing the powerful bonuses from substantial point investment in a single tree.
On this issue, keeping in mind that we're electing to play a sub-optimal build here, I'd still like to optimize the overall quality of my character's build, but subject to the constraint of being balanced around stam/magicka. Hence, I'm fairly tossed up between going 1:1 mighty:elemental expert and just building melee expert for the atronach passives.
Not to focus too heavily on champion points , I'm interested in whether anyone else is choosing to play this kind of build, if you're enjoying it, how you find group play and anything stam/magicka hybrid related.