I switched back to my rings on the hammock because I use 4 ft straps and sometimes trees were too big for the rings to pass thru the end loop. With your 10' straps this is not an issue. I think that if more people tried the garda hitch with the rings they would switch. This seatbelt poly packs really small compared to the one inch poly also.
4' of seatbelt poly with loop in one end and spyderwire tied to the webbing with a sheetbend (WBG style). Spyderwire to the rings. I don't think it can get much lighter and still use the rings.