maybe have a event tht you can earn a buff specialist. instead of having to go around clicking all you building you can select wat buildings to buff and with what buffs through him. and you can save your options, maybe have 2 save slots and you can buy more in merchant. but basically you just send him out and he walks around buffing the buildings you want him to buff. and when the buffs end you can just send him out again if you have the buffs for it. because some people have a ton of buildings to upgrade regularly. and maybe add a skill tree on him to where it gives boosts to the buffs.