Does everyone have any favorites for utilizing his skills? At first I thought this would be an awesome ability, but once I read the opinion on his tier status and then actually using him, I felt a bit underwhelmed.

I understand a knife would be a weapon of choice to attach effects to, but without doing damage what are the most useful effects for weapons that aren't physically discarded or more useful when played?

Grenades? Causing the modified weapon to get trashed?
Shotguns? Doing an extra explore possibly with less damage?

I feel that I'm missing something.