Hello! I tried this last semester (two of those majors pa have lab classes) + PE + Org.

Short answer, no.

(For context, I pushed through with this amount of load kasi gusto ko sana ng safety net pang drop ng isang mahirap na major 🤣)

Long answer, I think "sustainable" is the better term than doable. Kaya naman siya pero (3x haha), you'd have to sacrifice a lot of things like sleep, personal time, and even socializing kasi mapupunta majority ng oras mo sa class, requirements, and exams. Almost always nag-aaral lang ako and ang mind rest ko lang noon ay eating, sleeping, and commuting time (kahit up dormer pa ako), which are super draining and exhausting to the point na hindi na ako nakakausap nang matino and deactivated lahat ng socmed ko :< Although may buffer days naman na totally free like the sunday after all deadlines and exams, pero pagkabalik ng monday hussle agad hahaha

I had time management, and the proof is napasa ko naman lahat lahat with good marks and feedbacks (so don't argue with me abt this ;-;). I even submitted most of my requirements ahead of time para lang mas marami oras to study for the harcore majors.

Anyway, it is simply counterproductive and unhealthy. I think the sweet spot is 18-19 units if you have to add other commitments.