I think that dragoons/stalkers/adepts are almost pointless on later missions, i used a lot of vanguards and colossi to nuke down the first shard while using the time stop only. I watched Jay's brutal video, he had to use two spells to nuke down a void shard while using dragoons. The good think about LotV tech is that it is very versatile and enable you to choose from a great amount of builds. But i find his micro only average and his macro/multitasking horrifying, years and years of commentaries and he still has thousands of resources on bank while being supply blocked.
I love Jayborino commentaries because he take a deep look on the story/ characters/ lore of the official/custom campaigns, plus he is not annoying fuck alwais trying to be funny.