Looking through the Apocalypse book, I see that the IG section has updated the formation for
Master of Ordnance gets 1+D3 shots per shooting phase -- nice. I've never been a huge fan of the MoO due to the inaccuracy of his shooting, but with 1+D3 shots, he gets a bit more appealing. (And besides, it's Apocalypse, so why not?)
The Vostroyan Company Commander model looks sufficiently cool to make a good stand-in for Creed. At first I thought that 'the Ancient' should work well enough for Kell (even if lacking a Power Fist), but I decided that I'd convert up a Vostroyan-ishKell using some Cadian command squad bits.
As for the advisors, I have the old Demon Hunters Mystic as my Astropath, and Lt. Varras rom the Battle for Macragge set as my Officer of the Fleet, I don't however have a MoO. The GW model for the MoO is too Cadian in appearance, so I decided to make my own to fit in with the Vostroyans.
Here's the whole crew, ready to go to war!