Ice crash templar (Maybe)

Hi everyone, I was theoricrafting a templar build revolving around using a main-hand Camelia's maul and an off-hand Dyadus, with lots of cold damage to freeze and controll big areas of the screen, and to deal tons of damage. The skill tree would look something like that:



But, given I'm not an experienced player, i'd love to hear some feedback on the build.