Rigard and Vivica ( together they fight crime)
I have Rigard 4*+18 and Vivica 5* 4.80. I still use Rigard more often since I usually need cleanse more than cleanse+ defense buff.
It is hard to time Vivica to get the most of her special skill.
But Vivica is very useful. There are no Classic 4* yellow healer.
I plan to take Vivica to 4*+1 since mana shield is awesome.
Reset emblems
I am too iron, and food, poor to use reset emblems