u/SorryEscape8711

So I am about to magnetize my first minis ever, but I heard the view that when magnetizing miniatures for Middle-earth it is better to put metal under the minis base, then place it on a magnetic sheet, rather than have the magnet on the mini then place it on a metal sheet. With the thinking being there is no chance of magnets under minis becoming stuck to each other when they are in base contact during tabletop play; which I have seen happen from time to time. So is this worth it and if so, is there any advice for a what small bit of metal (e.g. jump rings?) would fit on our 25mm bases and stay on a magnetic sheet?