Are climbing master points made with a girth hitch or clove hitch REDUNDANT???

Benjamin Schuldt donated some 60cm mammut contact slings (https://amzn.to/2W8PAm7) made out of dyneema, which is very slippery so when one side breaks of a leg of a climbing anchor when a girth hitch or clove hitch is used it isn't very redundant. Yann Camus from https://www.youtube.com/user/ycamus came up with a combo that might be more redundant. What do you think?

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Видео Are climbing master points made with a girth hitch or clove hitch REDUNDANT??? канала HowNOTtoHIGHLINE