During the End Phase, if a "Gladiator Beast" monster was Special Summoned from your Deck this turn: You can Set 1 "Gladiator" Trap from your Deck
[BT16-063 Shakkoumon] also has and strong defense when digivolving, allowing you to safely perform [BT16-026 Vikemon ACE]'s or DNA Digivolve again
Some of the sets are MRL, MRD, IOC, SYE, WISU and more
That being said, I don't have that same luxury with the more obscure decks so generally speaking, unless there's a lore specific reason of limiting cards to certain quantities due to their uniqueness (for example only 1 copy of each Crystal Beast existing), 2 or 3 copies are acceptable in order to preserve the feeling of the deck as it appeared in the anime
As for the latter resurrection effect, do you usually prioritize this one
Final Thoughts Sharks, Kragen Control, Fish, Water Xyz, whatever you may call it, is a consistent deck that can easily gain control of the board with its simple Xyz combos