what I constantly use are those (try to get it kind of sorted according to my workflow)

EP curveTool

loft, revolve
birail - somtimes surface fillet

rebuild curve/surface
attach/detach curve/surface


project curve on surface
trim surface
duplicate surface curve
loft - rebuild again until i get clean patches

insert isoparms + tweak verts by hand
i use rebuild on curves and surfaces a lot!