PoE builds similar to Impending Doom Gemling Legionnaire VS The Trialmaster

Hi, So, I tried the Saboteur build and didn't really like it so I was gonna try my favorite ascendency, Elementalist. Does anyone have any suggestions for things to take a look at or test? I have a rough draft of a tree up to around \~90 here: The tech I'm hoping works is that Pyroclast Mines "pop" before firing the mortars a brief second later. I noticed that if you add flat damage to the skill this pop can chill and even freeze, which adds a neat pseudo-defensive layer. With Shaper of Winter we don't even need to add flat cold