With current cap you need at least 69 force to be a good resser and if you are using just 1 imbue you dont need have 80 for fire and ice. Go for 80 on your imbue masterie and pacheon, 69 force and complete with 68 ice or 69 fire (this will depend on which masterie you choose as imbue).
BTW you will be slow as hell if you dont take light

. Maybe leaving your imbue masterie at 69 (this will lower your magical damage

) to get 12 levels of light for extra 4% of magical damage (this will incease it

) and for first level grass walk (at least 20% extra speed).