I have no idea about which modules to use for screaming techno - from the look of the rack - usual noob issues - too many big shiny modules - not enough support modules - but that could just mean too small a case!!!
as for what you called your second dilemma - I would not be so hard on yourself - use the tools as needed - analog/digital - really who cares??? definitely not anyone in any audience you might have!
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities