I've been using this guide by MoonlitCacti and it works pretty well: https://www1.flightrising.com/forums/gde/2869409/1
+ when leveling up when the guide doesn't go level by level, I drag 'em to 25 in some other venue and then add battle stones, tincture + stat at the end. Sometimes I'll add battlestones and start allocating stats if they can be helpful in the fight (their quickness is high enough to get turns and they can contribute a rally/scratch/heal or something). When I do that I just look at the final numbers and make sure to not go over them.
Re: Forbidden Portal Teams?
+ when leveling up when the guide doesn't go level by level, I drag 'em to 25 in some other venue and then add battle stones, tincture + stat at the end. Sometimes I'll add battlestones and start allocating stats if they can be helpful in the fight (their quickness is high enough to get turns and they can contribute a rally/scratch/heal or something). When I do that I just look at the final numbers and make sure to not go over them.