What is the main thing you want to do? You cannot Synchro and have Monarchs in the same deck.
So? Monarch can synchronize - look at Frog Monarch again, it has "Formula Synchron" as back-up plan. So those two are stay in. --- What'the matter? Disliked my grammar? http://24.media.tumblr.com/tumblr_m5vz0vCbdS1r1g5kzo1_500.gif
Monarchs can pull off Synchros. Its not their best trait, but they can.
The deck needs work, though.
Focus a little less on the Extra Deck. Add more Monarchs and Frogs. Swap Frog, in particular. To use Treeborn Frog, you will need to dump it to the graveyard ASAP. Drop almost all of your Traps/Swords of Reavealing Light to constantly summon Treeborn Frog.
Krebons should be paired with Emergancy Teleport. A great way to pull out Synchro 8's or tribute fodder with Monarchs.
Focus on Synchro 6's and 8's only. Drop Psychic Commander. Add a Scrap Dragon and a Ally of Justice Catastor.
Ptolmys M7 and Strike Bounzer are a nessesity with Monarchs.
It may be useful to try some Rank 4 support in order to summon Lavavl Chain to dump Treeborn Frog or topdeck hax a critical Monarch. The Gravekeeper Spies work well for this. Perhaps Photon Thrasher, as that can help Monarchs or quickly Synchro 6 if needed. --- How many lasers does it take to open a bank account at McDonalds?