I'm Currently running a campaign of rogue trader, deathwatch and dark heresy. I have the base books for all three systems and
Mark of the xenos (aliens can show up any where, and troop level deathwatch enemies are good adversaries for dark heresy while Elite level make good bosses)
Rites of battle (vehicle rules and chapter creation)
What other books should I get:
*I don't do premade adventures, I have nothing against them, just aren't my thing.
*Other then Koronus expanse, my campaigns don't take place in the default sectors.
*Any good rules for eldar? they appear commonly as allies in all three campaigns.