A fun run indeed. I wanted to start with Parra and Karakai to try the Magical combination. And it's... magical! The +1 mana regen is great and the +10 dmg not bad at all with Parra's zephyr mechanic. Karakai is also very durable and with items like shattershard or what's it called is... amazing. So much dmg from its defense.
Very fun. Also easier than I thought.
I found Skimander later and I was not happy in the beginning (I love its mechanic and design, but I did not think it was gonna work with the first two monsters), but I made it work with a nice help: I merged the Hunger Armor with the Living Seed, so that it could heal everyone. Combo that with its ability to heal itself while in the backrow... well, heal everywhere! It's great.
I've already said it in another comment, but I repeat: I very often find myself ending with three final stage monsters. I struggle to use less than three and more than four. Does it happen to someone else?