Could maxed bertulf and/or treevil be strong enough to use in 4 star events?
In attacking absolutely. On Defense I’d only consider Treevil.
Speaking of bertulf and treevil, I also have shrubbear and grievel, which ones would I use to be the most effective?
Yes they can, I’m using Bertulf even in legendary(5*) events.
Some people are using Treevil in v.fast wars and 5* tournaments.
By events do you mean challenge events? If so I use nordri, c.Gunnar, treevil in challenge events as I don’t have better replacements for them in their respective color. I’ve even used them in five star events
If you mean tournaments I don’t think bertulf would be seen often or if at all. But treevil gets used at the highest levels.
Bertulf and Treevil get a yes from me.
Both with full emblems
Both with LB
Yes, I actually lost to a double Treevil´s team last 4 star tournament