Creed + Devil Dog is okay. But if you're betting your soul on this list the rest of it is far from ideal
.
You don't actually need a Vox to receive orders. It just gives a bonus to the leadership check (a reroll to be precise). Vox doesn't even extend the range you can give or receive orders (retarded I know).
Having one squad with Vox makes sense if you're making a blob for this purpose, but IG platoon here is too small to justify a Vox in my view. Sure, Creed also has an awesome order than gives Furious Charge and Fearless to IG infantry units, but the Guard aren't exactly known for going into melee and living
.
If it were me, I'd switch out the Stormtroopers for another Veteran Squad + Chimera instead. Vets are cheaper and come with an extra special weapon slot. So you get three BS4 meltas (which can be fired _inside_ of the Chimera) instead of just 2 for 5 points less.
Otherwise, just take Stormtroopers without the Chimera - that way they can Deep Strike or Scout. That's what the extra 15 points are for - not the silly Carapace armor.
Heck, given how puny the IG Platoon is I'd just replace the IG platoon with another Vet squad with Chimera, plus two Hydras instead of autocannon HWTs.
This gives you six Chimeras (carrying Creed, 2 Psyker Squads, & 3 Vets), 2 Hydras, 2 Devil Dogs, 2 Manticores, an LR, and a Vendetta which will leave every weapon less than Str 6 utterly useless against you.
A stock LR would also be a better choice than an LR Exterminator. As there are still plenty of Marine players who stupidly leave their dudes in the open, and the battlecannon is just all-around more versatile.
Besides, the list already has plenty of Str 7 shooting, and the Hydras are MUCH better than HWTs for having armor, a hull-mounted Heavy Flamor, a special rule that ignores various cheating saves by skimmers and bikes, while STILL costing 75 points. Heck, if the list really needs Str 7 shooting, it's a better idea to get two Hydras instead of an Exterminator.
To fit all the heavies, just group the Hydras into one slot, and the arty in another.
I'm also seeing some outright errors on the list. Creed comes with a Company Command squad, which can be outfitted with stuff like extra special weapons and they're BS4. If he's aiming to have a fourth infantry unit that Creed can give orders to, the Company Command Squad can be it. Give it nice guns - every member of a CCsquad can get a special weapon.
Heck, the document notes that the germans would use overwatch ATG's to kill tanks on the offensive, not relying on their own tanks!
