We have a 10Kg Rocna. We recently had Tickety-Boo, Schogun & Godi rafterd up together. Ours was the main anchor and held us without dragging and inch. To make sure, we used the radar to take some range readings after rafting up and again in the Morning.
In short our little 10Kg Ricna held 2 Macs and Schogun agains a breeze of upto 15kn over night.
I’m very impressed.