Are there any guides? I can't seem to find any.
What buildings are on the "must have" list and which ones are optional or not needed?
Do you ever stop leveling up your heart? If so what's a good place to stop?
Is there some room, upgrade, heart level, trophy score, etc that triggers being matched more often with high level keepers?
I'd like to stick with the majority of my matches being similar level. However even at level 3 heart I'm already getting dunked on by people with scores in the thousands, immortals, and spells... even though I don't even have reinforced walls, a dark library, or an immortal.
Other guidance or advice?