This is quite interesting so I tried all the line-ups on my alt account without altering any of the monsters and positioning. The result? 10 Wins and 10 Losses.

Thoughts:

1. The Obsidian line-ups are spot-on especially the positioning.
2. Serpent of Eld with Kelya gets taken down easily due to its low HP.
3. Tarsa line-ups can win surprisingly
4. Out of the 10 losses, I was certain I will lose on 6 matches while the rest were odds based on who attacks first on the opponent's positioning.
5. 50% win rate isn't bad for a bot. No effort at all.

If you guys are interested to check the matches, I used splurgeexx.

Great info!