I’ve been on the fence on Dehaka’s prestiges.
I think Devouring One is awesome since it maximizes my playstyle of actually building an army around him. But i’ve read that it’s better to go P0 if you don’t give buffs to your ally, which I kinda disagree since it already buffs your army a lot as long as you eat a flying/mech/armored/psionic unit.
I’ve found Primal Contender is good in multitasking or absorbing essence from the other side of the map and helps you get maxed sooner. But not being able to spam all or a couple of pack leaders for a big push might be a tradeoff depending on your calldown management and saving the right pack leader for the job.
As for Broodbrother, at first I thought it was going to be a nightmare to handle but I managed to pull it off with some properly managed control groups (surprisingly P3 abby is harder to manage). It would probably be a solid tie with P1 if not for the separate XP making maxing them every game highly unlikely especially on short maps. I never had a standard game where I maxed both of them without resorting to delaying.
In conclusion I’m going to have to say P1 is my favorite, it maximizes my playstyle. Dehaka gets maxed faster since lesser levels also means lesser time to micro him around the map to gather leftover essence (unless you want 3K HP on him every time), and your army gets major buffs as long as you know what to devour.
Which Prestige is your favorite?