Double Battles/Face Offs I think work if they are NOT sports themed and are more fun, quirky challenges at the START of the Leg. Maybe even essentially an Hours of Operation-type deal. I haven't
seen any HaMerotz Double Battles, but read about them and most seem very fun and not automatic eliminators, if you know what I mean.
On TARPH2, one of the best tasks of the season was a combo Road Block/Duel Duel
It was Leg 8 in Iloilo where teams had to hop on a cart pulled by a carabao through mud while needing to grab 3 flags. They faced off in pairs and the first to cross the finish line in each Duel would get the next clue. But if neither team got all 3 flags, both had to go to the end of the line. It was the best Duel Duel of the season and definitely one of the best overall tasks too.
This is the kind of stuff that I would want to see if TARUS ever "invents" the Double Battle/Face Off like TAR Canada "invented" it