I think the weights relate to the style of fishing youre doing. If spider rigging moving fairly fast (.3 mph or faster) a heavy weight such as 3/4 or 1 oz will be needed. If slip cork fishing a splitshot that works well with the float, drifting..then use a splitshot that will keep the line vertical, etc., etc. I use minnows on tightlines (either spider rigging or drifting) and move slowly so I generally use between 1/2 oz and 3/4 oz weights and I just "bump" along when spider rigging. I use 13' poles doing this. I always hook the minnows from the underside starting in the "V" and coming out one of the eyes, or close to it. Seems there isnt much in the way of killing the minnows when hooked this way.
Health nuts are going to feel stupid someday, lying in hospitals dying of nothing.