>>2924277
I would drop the holes and helix, and instead focus on corrugations/embossing patterns on your roughly cylindrical member. >>2924284 isn't the full story: that model says your diameter should be as thick as possible and the wall as thin as possible, which is unsatisfying. One of Timoshenko's books goes into the design of beam-columns where the theory is less elegant because results depend on an asymmetry that's only found by breaking the column.