When used alongside a card that lets you reshuffle your graveyard back into your deck, Time Walk can still be quite the strong card, and that means its a highly sought-after one, too
Basically, don't be too disheartened by the rankings
Ancient Tomb ($126) Fast colorless mana available on lands in Commander is rare, and you'd be hard-pressed to find one older in flavor than Ancient Tomb
Despite all the different versions, casting them is essentially the same: your two spell casters, Cecil and Rosa, will both have to expend 99 MP as simultaneously as you can in a turn-based game
Waterbenders Restoration is an option I like quite a bit
It needs less bodies to win with since you only need to deal 10 total damage to your opponent to kill them, and in multiplayer you just need 10 per person, very possible in one turn