if Maiden continually played the standards on almost every tour (like Rush does), Maiden would have like 7-8 songs to work with in terms of variety each time due to the amount of songs they play. Whereas Rush plays the same amount, maybe even a couple more standard songs, and they have like 12-13 songs to have variety with.
Dark Tranquillity - 2/23 (Maybe)
Tool - 3/27
Dream Theater- 4/20