well if u ran out of mana ,u cant tank either......u will be gone pretty fawst then.....i have a hybrid char and i use spear and i have the same dilema as you stress....
if i decide to go 90 heux 90 light and 90 cold and 30 fire(just for show)
it doesnt mean that i will use 55%-60% of the snow shield....
i mean i had a 80 cold mastery and 50% snow shield,on lvl 80 with my build it was inpossible to pvp....with garms i had mana barely to do atacks in prot i didint had mana at all....
so now my snow shield is 41%....u can still keep it 80....
what im saying is...that if u choose lvl 90 cold....you will have an excelent phys defense,buff and passive..but you wont have mag defense at all...so u have to go garment in that case....
personaly what im doing now with my char is....i put him in prot set,im gonna make his light and cold 70,fire 80.....
why?
its because,hybrids on lvl 80 have a slight problem with a light mastery,nukes and imbue....
theoreticly light has the highest dmg,but his minimum dmg is prettly low....very big oscilation in damage...which means what? if u do 7k dmg nuke or 9.5-10k dmg nuke...it is a hell of the difference,also including heux attacks,4k-6.5k with a skill....so if i choose fire i will have ,if not a bigger dmg,stable dmg at least...which will be from 8k-9.5k nuke,and the heux attacks from 5.5-6.5k......
i also considered to have light 60,ice 60....i have the same problem in deciding...fire max,weapon max...in that case i would have to stay in prot if not even switch to armor....
so my personal plan for my char is that on this cap ill be 80 fire 80 heux 70 light 70 cold,
on cap 90 ill go 90 light 90 cold 90 weapon,fire down,when they open the skills u will have new light nuke ,along with this one...so it will be kinda good,as for those oscilations...they will still be there...but if u put int from 80-90 your mag balance will be higher+ buff for 18% mag atack....that should cover up the dmg matter....
my choice would be classical build......theoreticly ice 60 and light 60 with fire 90 woudl be also great for hybrid (why?) ..high mag defense 9-10% of phys atack power increased....with a buff 9% with passive....
but take a look on pratical side....since your light is 60,movement is pretty slow...if u choose 60 cold...u will have low phys defense so u gotta go prot if not even armor.... imagine how slow u gonna be in attackings and movements in armor with light 60...:S
so better choose classical build.
the thing that stings me too is what if i put fire 30 what about phys atack bonuses in that case....since we are hybrids we need that too...u can do this put your ice on 80 and fire on 40...just to have some difference in phys atack bonuses.....
why doing that.....
well if im not wrong on lvl 90,phys passive skill shoudl bring you around 105 phys defense.....i doubt that it will be more than that...so that measn that totaly you will have 210 phys defense with pasive and buff....and with cold 80 u have 162 phys defense....which is still pretty decent....
snow shield will be 50%....on lvl 90 hybrid dont need higher that this (i think)...but question is is is worthy to risk that 1-2% more in phys atack over 48 phys defense...which is the difference beetween cold on 80 and cold on 90...
every build has their own advantages and flaws....if you dont want to think about build that much,make an euro char....2 masteries is more then enough for them

...
kiding.....
i would suggest classical build...(repeating myself..-_- )
even if your phys atack will be lower,u will have higher mag balance and your nukes will be stronger....i think that on higher levels,nukes will have a bigger difference in dmg when u level them...from 80-90...you shoudl be good with a classical build.i think ill do the same.