Potentially the SOD.

I mean I love, love, love the S5, but the SOD seems better suited to chopping and "heavy use" if needed.

I'd consider my DDF, but as big and powerful as it is, it's not the easiest piece to carry or conceal.

I figure the SOD is small enough for slicing or food prep tasks, yet big enough to baton wood or chop trees. It's an excellent compromise in terms of size.