My go to monogreen is Albe+19 - Evelyn+4 - Lianna+7 with MCB - Hansel+10 - 2nd Hansel unemblemed. This team can take out any defense team in wars and raids, even against GTV and red tanks. Albe serves as safety net which can revive fallen heroes and provide healing and mana over time, Evelyn also gives little HoT thru Element Link and dispels buffs on the target and neaby as well as debuff elemental defense, Lianna to kill yhe hero with the most threat or is about to cast his skill, and the 2 Hansels to provide mana control.
My second monogreen team is a bit underpowered: 3/70 Eve (dupe), costumed Lianna (dupe but maxed), Buddy+20 and a combination of 3/70 heroes i refuse to ascend until i get their costume (Kad and Elk) even while sitting on 19 tonics. I also sub 3/70 Greg or fully emblemed Telly or other 4* nature heroes.