please post a link to your public rack (the actual url) and not to a jpg - they are useless - especially if you want specific recommendations about modules!
get a bigger case - mantis is better value and has better power than the intellijel - you'll losse the 1u row and the built in utilities, but they aren't that much of a benefit imo - tiny beauty cases are great for demonstrating specific patches on you tube, not so great for actual modular synthesis!
think (loosely)
sound sources < sound modifiers < modulation sources < utilities
loosely as sometimes the lines can be blurred - multiple oscillators + a mixer = 1 sound source, some filters can be used as sound sources etc etc
do you need midi and a 4 channel sequencer and a dual quantizer (with a built in sequencer) I doubt it and starter cash would be better spent elsewhere rather than duplicating ways to play!
read a lot of other newbie posts and their replies - specifically regarding modulation and utiltiies - much more important than what oscillators you have imo
if you want to learn modular synthesis as opposed to synthesis with modules - then maths (and the 'maths illustrated supplement') are an extremely good jumping off point...
have fun!
"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