A VS lands. It covers the reel only if that full reel would then sit on a win. After the expand, two duelists take the column: the Outlaw and the Sheriff. Each holds a multiplier. The survivor's value applies to wins that include that reel. Every cell on the opened reel counts as wild.
The printed list is 2×, 3×, 4×, 5×, 6×, 7×, 8×, 9×, 10×, 15×, 20×, 25×, 50×, 75×, 100×, 200×. That is the cap on this title, not the 100× ceiling from the Wanted bonus. If two or more DuelReels share one win, the values are added, then that sum applies. They are not multiplied with each other first. Only one VS can sit on a reel.