If you want to , harmonize also allows you to tap one of your creatures to reduce said alternative cost ( strictly better than flashback!) As a drawback, you have to exile the harmonize spell as soon as it exits the stack (exactly like flashback)
Adding counters, recursion pieces, and ways to protect your combo will only serve to help you in the long run
While Kologan and Dromoka are the most balanced and Ojutai is the weakest (This is all in a Void mind you not in a Deck) and I play EDH exclusively so idk about other formats
My playing led me down a rabbit hole of Youtube videos about the PTCG, and Im getting the urge to start collecting and even playing IRL
You can use Maximum Belt (PRE 117) as your Ace Spec to bring that damage up to 330, which is a lot better of a number, but this is still not an excellent solution that you can consistently use
This side isn't a Saga, so it just stays on the battlefield for as long as any other creature can