>>1857475
1.0 mods without high investment and the synergy module (unlocks at admin level 70) have very low output compared to modern ones, pink snake from the current limited gacha would plow through story solo after you grab her sigils from the event shop.
Even better if you also grab Ling as anon suggested >>1857360
You can get 2 "free" copies of S-Buzen after spending $3 on 4.0 so maybe hold on that one.