In timber framing on a large scale, I find the slick indispensable. The only time I don't use it is if it does not fit in the pocket or housing. How about a 2" chisel just sharpened a little different. Give the edge a slight radius to the cutting edge, and on the bottom, not the bevel side, hone or reshape so it is not flat but has a belly in it, just like a large slick should have.

I am also starting to discover I like a longer handle. The slick I use has a nice but shorter handle, I am thinking of adding a foot or so to a new handle, pushing it to 3'. What lead me to this is the scarf slick I have been using it has a wonderful long handle on it, it is like a great big gouge, it really hogs the wood off. I'm not sure what makes the longer handle nicer, could be the mechanics of it, more body behind it.