Assuming no strategy deviations, 1 in 60 royals will be sequential. The reversible royal jackpot pays 161,556 for 1. Any other royal pays 800 for 1. The average royal win is thus (1/60)*161,556 + (59/60)*800 + 17,396 for 1.
If we assuming all royals pay 17,396 and play optimal strategy based on that royal win, then the return drops to 103.56%.
If we play standard 6-5 Bonus Poker strategy, which is the base pay table, then the return drops further to 101.97%.