For working on leveling jobs and not being at level cap (where all recent/relevant guides seem aimed), or even at current expansion, I've been taking a peek at this site, which offers a convenient slider to select your levels to see how rotations evolve as you progress. Although, perhaps in this case mildly misleading, the way it appears to suggest using Summons consecutively, could maybe be clearer about using the attuned Ruins between Summons..

SMN's been trimmed a lot, to mixed reviews. Lost a lot of complexity. But, many argue, actually feels like what you might expect from a Summoner now. It's fairly straightforward, once you see how the pieces fit together.