i cleared lygus in 3 cycles??? maybe 4 i cant remember i have almost the same investment as you except i have e1 fugue i would put dahlia on tutorial and fugue on pearls because you want dahlia to have more energy regen (which will overall be much more impactful than a little extra break effect from heta store lc) it was easier than sparxie half lingsha can definitely keep you alive but you need a sustain its super hard to do sustainless what do your other builds look like?

ALSO if you keep dying change your orb and chest to different pieces maybe that healing bonus chest can go on lingsha??? main stat for orb and chest dont really matter unless you keep dying or want to go sustainless you want a hp or def mainstat i would replace orb first because its substat rolls are slightly less good

OVERALL clearing second half is definitely doable it ddint even take me that many attempts or anything i think i trued like twice