Nurgle Daemons + Hellion Allies

Hey guys I've been playing my Nurgle Daemons lately, and the biggest problem of course that I'm seeing is trouble catching people. I'm playing at 1500ish points, and I'm thinking about adding an allied detachment of hellions with a Baron Sath attached simply for the purpose of hit and running. Plus, if I take that stunclaw I can drag enemy IC into my Great Unclean One and Plague Bearers right?

My nurgle army is basically

GUO

Mark of Nurgle Daemon Prince with wings

Full troop of Plague bearers

More Plague bearers (this one sits on my objective)

Plague drones x3 for running around

Nurglings x3 for tarpit

ADL with cannon (usually in front of my objective and as cover for my camping plague bearers

So I was thinking of adding Baron + 9 hellions, because that is a bit cheaper than buying 3 more plague drones and could be fun.

Any positives/negatives to this idea?

Negative: Hellions "catch" the supposed thing you want, the Daemons can't get to the "caught" thing because of the Desperate Allies rules.