<font color="blue"> if even watching while at a signal light in traffic. I have yet to see any "professional" hoe operator use anything other than the, previously mentioned, "tripod setup" ... rear wheels always spinning from oil viscosity ... but not greatly off the ground. </font> This is true to some extent but dangerous in some others. Operators do stuff with their equipment 8+ hours a day, sometimes 6+ days a week. Somethings we do, an inexperienced person shouldn't try. And the type of equipment has limitations all on its own. A 20ish hp cut w/hoe is not the same as a JCB 214 which is not the same as a cat 416 which is not the same as a cat 325 excavator. They all have little quirks which make them a little bit different.
Setting up the machine is all site dependent.The closer the wheels are to the ground, the deeper you can dig but; if you want to lift, then you would set the stabilizers as high as possible. Uneven terrain, one may be all the way down and the other half up.
On the smaller machines, bucket curl is where most of the power really is. For stump pullling, you would undercut as much as possible, then use the bucket to pry up on the bottom of the stump, popping it out of the ground. Leverage is the key, because there isn't enough raw power to accomplish the task.
Side to side sweeping, like trench filling, is another technique that a small hoe isn't equipped for. You can do it, but you can only move small amounts at a time.
BTW, Rear wheels spinning is usually because the brake isn't set or the shift linkage is loose.