Anybody tried Primal Energy manifestations competitively?

I used them in a doubles tournament today and I was surprised how well they worked. I had Loc (sword + illusionist + blade), 2x Blue Horrors and 2x Flamers with lore of change and wyrdflame host.

Because I only got 2 spells and no buffs to cast in this list I went for the Primal Energy lore which has fairly easy casting rolls. They put in some work, too. Lifeswarm + blue horrors felt mean. Burning Head being able to plop down and shoot D6 shots without even needing to move was great, especially since this list was super shooting heavy to begin with. The Jaws didn't do so much for me, but I think it was just luck. I used it block one of the Skaven player's Gnawhole's in game 1. Game 2 it blocked covering fire and lured in enemy units (charges) that I wouldn't have been in range to shoot on the following turn. My opponents seemed to think it was a big problem, so they focused on killing it before it could do much. Game 3 was rough because I had terrible destiny dice and I kept miscasting (R.I.P.) but even just getting emerald lifeswarm out once healed my LoC completely and kept a block of blues alive and on objective for an entire extra round. I ended up going 3-0 and I don't think I would have if I brought Morbid and casting buffs instead.

Honestly surprised how effective they were. Anybody have opinions on this?