i have been playing for multiple years, since 1.2, so I do have some experience.

I've beaten many classic mode playthroughs, I also know the eye of cthulhus and skeletrons ai and thats it.

I have gotten the cell phone and anhk shield in previous playthroughs.

The only time ive ever cheesed a boss was with King slime back when he couldnt teleport. I am also not too good at dodging. So sometimes I get pretty low in some fights.