Okay, start proposals with the above options. I got these all pretty quick and they present some interesting options.
Start 1: Strong shield start with a food bonus, near the coast as well. No visible water source though, so setting up a good settler factory may be difficult unless one is nearby.
Start 2: Strong food start (cow, floodplains, river) with luxuries. But low in shields (one visible BG, some forest to the East and West). Might be able to set up a 4-turn Settler factory (definitely 6), but the Jungle to the North will hinder expansion in that direction.
Start 3: Not immediately a strong food or shield start, though decent in both and with good water supply. The gold hills make for great city locations too (COTM13 taught me that one). Looks to be a very powerful position for a core in the Industrial Age.
Start 4: Very strong starting city position with a gold hill and a lot of BGs. No water so it'd need an Aquaduct though - a drawback. Free goody hut too.
Start 5: Balanced start with food (cow), water, and shields (BGs). Probably best overall in terms of balance.
Personally I like 3 most for some reason, with 5 in second place. Of course anyone else is free to come up with their own, but I thought these were pretty decent for Monarch.