Hi, don't really want to make another "I'm new to DMM Aigis, send help" thread so I hope I can just ask some questions in this one.

Long story short, I played DMM Aigis very briefly a long time ago and stopped because I was too much of a shitlord to get past the anti-gaijin thing. Fast forward ~18 months and here I am again. Logged in and for I had like 90 SC and blew it all off on premium summons. Then using these new shiny units, I plowed through some starter missions and spent 10 more SC on 1 summon and 20 inventory spaces, so I could get the Stamp Card bonus for the month after (probably a bad decision to waste all that SC as a f2p, but the temptation to roll was just too much). This is what I have so far:

New DMM player asking for advice-v2vkxrp.jpg
New DMM player asking for advice-fwghfvm.jpg

Not included are two more Rainbow Fairies, a Rainbow Fairy with blue hair instead of pink, a Spirit of Awakening, and 3 Plat Armors.

My question is whether these units are ok to start out with, or should I try rerolling for another Black? I read the other thread discussing Mage Armors and think she shouldn't be too bad, right?

Besides this, right now I am up to Return to Ruins and just using that to farm up Katie and Alissa for awhile and then Iris but who should I take into priority consideration for leveling afterwards? I know HAT is the general rule, but there are so many hybrid classes that can do more than one thing at once that I'm not sure if I should just stick to leveling Silver common archetype units or if I should pay more attention to the golds/plats I have on hand?

Also, are there any early-game goals I should be pushing for in the DMM version that don't exist in the Nutaku version? I know reading the JP Wiki would probably answer a lot of my questions but I really dislike reading machine TLs like Google Translate. Hoping a veteran wouldn't mind helping me out here, or linking me to an English guide/FAQ of sorts.