Most people just use the points values. Power level makes for quicker list building, using standard unit sizes with the cost of sny upgrades included in the power level. As for the D.A I have the codex but not gone through it really. Unlike a lot of people I hate the new primaris marines, that being said inceptors are too good to pass on really.
I don't have the codex to hand but with what you have listed you would s decent army based around the predators, the crusader and ravening squads, that be half your points right there. Marines are s bit lacklustre this edition but the D.A have good stratagems and some unique flying units. Not really helpful I know, but im a collector not a gamer really