Banks of 12AD, Double damage AP aren't enough for you?
Seriously, even if it fitted the background, there simply aren't many more ways for the Dilgar to develop. Their huge buckets of medium- lethality dice on moderately survivable, seriously fast hulls are already a pretty effective solution to most problems. Smaller numbers of individually more capable dice rather than simply more of the same, and that means inventing new systems.
On the other hand, here's one I perpetrated earlier...
Dilgar Tuvathrakur Superdreadnought, PL Armageddon
Speed 8, turn 2/45, Jump Point, Shuttles 3, Command +2
Hull 6, damage 76/8, crew 84/10, troops 12, 4 Thorun flights
Heavy Bolters- range 15, Double damage AP, 10AD F, 6AD P,S,A
Quad Pulsars- range 10, twin linked, 8AD each F,A,P,S
Pulsar Stream Cannon- range 30, Double damage twin linked, 6AD F,A,P,S
Superheavy Bolter- range 20, F, 12AD, Super AP Triple damage (crits resolved as two double damage, rather than x4)
Scatter pulsars- range 8, T, 8AD, anti- fighter
I've been disappointed with the stats I've seen so far. 'Armageddon' should mean something, ships that are genuinely terrifying, sufficiently superior to be the centre-points of a fleet, ships that could single- handedly take on and eliminate a conventional battle squadron. That was the benchmark I was aiming at. Overdone, or nicely nasty?