Master of Waves didnt end up being as valuable as Sphinxs Revelation because you only need it for one deck, and if Mono-Blue Devotion stops being a playable deck (which might happen now that Born of the Gods is here), this card will crash pretty hard
While he can certainly perform admirably within the context of this precon, I believe that youll probably get more mileage out of this deck by replacing Szarekh, the Silent King with one of the other commanders if you plan to upgrade this deck to play in higher power tables
Some sets are great for casual players, others push the competitive meta forward, and a few shine as long-term investments
In fact, most Ghalta decks are simple and rely on getting her out early and eliminating players through Commander Damage
Muzzio, Visionary Architect also helps you to cheat out artifacts, and it scales in power as you get bigger and bigger artifacts onto the field