I'm in the same guild as Wildflower and generally come second in Baal/Cerberus with the occasional win. Wildflower is much more powerful than me, but in Banish events I can get very close despite my heroes being weaker. The only area where I am stronger is I am one level higher, but I don't have the second sub slot and I shouldn't be getting close to beating Wildflower.
My Line up is:

Lancelot Cianna Aphrodite
X X Main
Herja X X Sub is Themistocles.

If I change form on every hit, I score higher than if I keep it static so I change Main's position in middle row each time. If I do this, my average percentage per hit increases by 0.6%. This has been tested over the past 6 weeks and remains fairly consistant. So, with 80% boost, my average is 3.28% per hit (based over last 5 days).

The scores also change depending on who is fighting. If our 3rd best at Baal/Cerb is playing, Wildflowers average drops, but mine increases. This might be a game anomaly, but again it is consistant and I have been monitoring it for a few weeks. If our 4th Best is fighting and 3rd best is absent, then Wildflowers average increases and mine drops.

From this, my conclusion is that Baal/Cerb is affected by number of players hitting and the strengths of those players.

I am a statistician by trade and nothing in Tynon follows the normal statistical patterns. Its impossible to guess how well you are going to do with each hit, but it is possible to test various methods and take the most productive route.