After 35th trait in fire

[Rhuan]

Hi guys, the 35th trait gives as +5% increased damage, after this, the remaining 19 traits give only 0,5% increase.
So after the 35th what you think is best? Go straight to full fire reaching 54 traits for 15% increase (2M+ for every trait) or put AP in frost?
My guild is in try to Mythic Guarm, but I don't think to achieve to get 2M AP for the 36th trait before the kill.