It was only a matter of time, right? While technical tricks like stacking a thousand explosive barrels or leveraging fall damage for Owlbear elbow drops are impressive in their own way, I’ve yet to see anything truly representing Dungeons & Dragons’ frightening powergaming underbelly from Baldur’s Gate 3’s community. That is, until now.
I skimmed that article, but from what I remember, in 5th Edition you’re only limited to only one bonus action per turn. Meaning that stacking that many bonus actions is probably a bug rather than a feature.
You get one bonus action but the rogue multiclass gives you a second all the time. Then the monk ability gives you an extra one for a few turns.
You’re limited to one reaction but bonus actions are like actions so anything that gives you an extra one is perfectly okay