Yeah, or 80% - the manual should have a graph to clarify this.
Not sure why you're using 6013 on small plate - that's for making horseshoe flowers, not work.
6010/11 - my go-to. out of position, root passes, rusty farm stuff, etc
7018/AC - I'm not an iron worker, but that's what they use
7024 - cap or for in position/flat work
I have an AC tombstone (it was my grandpa's) and grew up with my dad's AC thunderbolt. I have the leads to run DC stick on my Syncrowave, but I've never bothered. There's something therapeutic about running stick on heavy steel, I think I'm going to weld some bucket hooks on this week and I'll dig out the stick welder. 6011 job all day long, might cap it with the gorgeous 7024.