specialize your cities to avoid that kind of problem. use tiles with essences for conclaves, high production tiles for fortresses and build towns on those mediocre 5/3/0, 3/4/0 or 4/3/0 tiles (depends on play style - spam lots of simple units with high production fortesses or use those production heavy tiles for extra towns and build only one or very few high essence fortresses with damage/inititiave/defense enchants and rush buy elite troops with all that excess money from the towns)
towns are there for cash and faction food - they don't really need the extra unrest reduction from the essence based buildings (cleric/shrine/temple) since both their production and their research aren't very important. if you have the choice, pick locations on rivers since the pier/harbor buildings increase both, gildar and growth, which are the main strengths of a town.
a few conclaves on high essence tiles can produce crazy research (especially in the mid/late game once you add an alchemist and the research percentage buildings). concentrate your research there.
focus the towns on gold (merchant, market, well/inn/festival; if it's on a river also pier/harbor/water mill line). keep in mind that food translates into growth, so don't neglect the +food and faction food buildings either. a base town (level 2) has 4 gildar base yield, a level 3 town has 8 base, a size 4 town has 12 - so growing them to higher levels also gives you more cash to filed larger armies. skip the research buildings in towns until all available money and food buildings are built - a bit more research is nice, but a single decent conclave produces more research than 3 towns combined, so don't try to get everything everywhere. specialization is more efficient than trying to balance all settlements to produce a bit of everything.
you may also want to use one of those 1/5/0 forest tiles for a town. it will take a long time to even reach level 2 (you'll need some agrarian tech, a granary and probably some faction food buildings) but you can use this site to get the treasury vault and brewery built fairly fast once you unlock those buildings.