well depends on what type of hybrid your gonna make, i would definatly drop one of the weapons either go heuskal or bicheon
As for fire.. well if you intend to be a nuker ,fire is sort of a must, thats atleast how i see it, not just for the imbue but for the fire nuke
I and defintaly get lighting... you cant live at higher lvls with out grass walk or phantom, i learned the hard way xD, once you use phantom you realize its a must, either for chasing in job or for running in job

, besides the all mighty new lighing nuke in the skill expansion or the magic attack buff, or last but not least the parry increase buff and pasive.
thats atleast how i see it, but im sure someone who has a high lvl hybrid will guide you better on your choice..
Good luck!
