However, if the turn order was different, then the game would be different.
I don't think this is the correct assessment or it is if we take your premise as-is. However, there shouldn't really be a situation like this. All players should carry enough removal and counters so that the poor Baral player isn't carrying the entire table.
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Regarding the example table; I don't think I can make a fair assessment if I don't know something about the hands (i.e. card counts of opponents and cards in my own hand). I would in fact wait if I don't have anything significant to cast. The board doesn't look like anyone is about to win next turn due to all the tax. Untapping a land seeing what happens could be good enough.
I don't know what the Sidisi player is up to but untap land + play land is 4 black mana, which is threatening. If I save the
Nature's Claim it's possible that Sidisi's threats get countered by the Grand Arbiter player. Or Derevi. Neither of those two is close to dropping anything big so I wouldn't rush it.
Things change a lot if I have a land in hand or a 5-drop, in which case Totem's gotta go.