"The battle barge Carnivore, along with the strike cruisers Heavenblade and Sanctifter's Son, were more than enough. But they were joined by more - the interceptor cruiser Animosity scattered the battlefleet's flank merely by driving forward with its lance arrays charged. The carrier-fitted battle barge Mare Infernum, meanwhile, sported so many assault boat docks that they covered it like scales - the prospect of the ship launching a boarding action was so truly ghastly that the battlefleet fell into general retreat, Tsouras be damned. With the flaming wreck of the Heavenblade in their midst and the highest-quality ships now bearing down on them, the ships of the battlefleet were in utter disarray."
"Closer was the Soul Drinkers' fleet, the size of a sector armada, formed almost entirely of lightning assault craft -some pregnant with pods and boarding torpedoes, others weighed down with lances and nova cannons. The Leuctra was hanging in the blackness beside them, and on the other side was the Carnivore still bearing the scars of the Cerberian Field."
"The rest of the fleet could be seen glittering further out. A silver diamond was the immense training platform on which novices and Marines made practice drops and dummy assaults, live ammunition and hard vacuum combining to force combat discipline into the brothers. The strike cruisers looked like a shoal of fish in the distance - amongst them would be the Gundog and the Unendingly Just, undergoing flame-cleansing by the servitor purge-teams in case Sarpedon's Marines had brought the stain of corruption back with them. Furthest away yet huge and bright, was the Glory. Immense: half as big again as a standard battle barge."
Well the Glory is described as half again as large as a battlebarge, probably very similar to the Eternal Crusader which has been refitted and expanded many times over the years.
I would go for somewhere around 14 hits (not half again the hits I know but it must be kept realistic in game terms) 20cm speed 45* turns 4 shields maybe 5 turrets. Armaments would likely be a mix of lances weapons batteries and bombardment cannon with prow launch and torpedoes. Modeled after the standard barge with the weapons area lengthened to support 3 weapons "pods" One standard Imp weapon battery and 2 Lance decks preferably with different turrets to differentiate the Bombardment cannon and Lances.
Glory................................................………..............525PTS
TYPE/HIT SPEED TURNS SHIELDS ARMOUR TURRETS
Battleship/14 20cm 45 4 6+ 5
ARMAMENT RANGE/SPEED FIREPOWER/STR FIRE ARC
Prow Launch 20cm 2 Thunderhawks N/A
Prow Torps 30cm 9 F
Dorsal Bomb 30cm 8 L/F/R
Port Weapons 30cm 6 L
Star Weapons 30cm 6 R
Port Lances 30cm 2 L
Star Lances 30cm 2 R
Port Bomb 30cm 4 L
Star Bomb 30cm 4 R
The Mare Infernum. It sounds like an Emperor or Despoiler from the description, possibly also refitted to replace weapons emplacements with additional "assault boat docks". A special note on this would be the use of Assault Boats instead of Thunderhawks specifically.
I would base this off of the Despoiler replacing all side weapons with launch bays
Mare Infernum..................................………..............500PTS
TYPE/HIT SPEED TURNS SHIELDS ARMOUR TURRETS
Battleship/12 20cm 45 4 5+ 4
ARMAMENT RANGE/SPEED FIREPOWER/STR FIRE ARC
Prow Launch 20cm 3 Thunderhawks N/A
Prow Bomb 30cm 4 L/F/R
Port Launch 30cm 6 Dreadclaws N/A
Star Launch 30cm 6 Dreadclaws N/A
Dorsal Lance 60cm 3 L/F/R
I'm not sure what an "interceptor cruiser" is, but I would guess that this would be a special variant of the standard strike cruiser, most easily duplicated using the stats from The 2010 compendium for a lance armed SC, or possibly a lance Dauntless or Endurance.
Obviously they had access to several battlebarges of not only standard configurations but also special variants I would categorize as venerable battlebarges. Along with this they have tons of strike cruisers "lightning assault craft" many I would assume to be full cruisers "others weighed down with lances and nova cannons". Maybe take a couple standard cruisers also? A Dominator or two would probably fit in according to the fluff.