I'm not strong enough yet to venture into 4-2 yet, I killed the silver skeleton's and black skeleton in 4-1 to get the crescent falchion +1, but I did so in a very cheap ( and looong) way.
I'll keep 4-2 in mind though when I can finally clear it normally.
Also doesn't a suicide, or just dying in general mean your world/character tendencies get fucked? >_>