I have a hybrid s/s for my main char that I am working right now. Its lvl 57 with 6 gap and I am farming. Let me tell you what I know.
I have tried dual weapon, and pvped a whole lots of people. Had my spear to lvl 43 mainly for stunn and knock back, was planning to go till 63 to get mars.
But after I pvped some it seems switching weapon is not comfortable during pvp. Switching to spear was easy, but switching to sword was not. Coz after you put on sword shield takes a little time gap before it will be equiped. Overall its not too efficient considering the cap 90 update is pretty close. And then you have to chose whether you keep the spear at 63 coz then you have to lower other skills.
Also if cap 90 comes with skill update then you better get 90 light, 90 fire, 90 sword = 270, coz they all will have updated skills. then you have 30 left for either spear or ice. But you can say you want 70 or 80 sword and rest for spear, then what about maxing you kd and stab; that will save your life as a hybrid.
So I decided not to go dual wepaon even tho they are kool. I am going for
90 fire 90 sword 70 light 50 ice for now ( 90 cap). If the 90 cap comes with skill update then I will delvl ice to 30 and take light to 90.
also at lvl 30 passive hp from spear is like 200+ something which is lame. but again lvl 30 gives about 18 physical def as well which is not good either, so its up to you.
For spear hybrid mag balance need 85% naked, s/s is good with 90% naked. I would go s/s coz shield and kd stab, spears has to depend on stunn mainly then mars. but with kd you can always stop any of their attack. Dont spam kd but use it ofent if you are s/s, and no chain in pvp.
Ahh..Think I have written enough...I am not lvl 80 myself, this is what I have seen so far till lvl 57, and yes you will depend on pimped gear more than any other build. But hybrids are good, fun coz they cant tank a little and also can nuke

Good luck with yours..