Should i regild to Lilin?

I have a total of 213 gild and my HZE is 2224. My Siya is 640 and Argaiv 650,while Morgulis having 341770 HS on him( i know, i didn't do the math so well, cause i'm more of clicking then idle).

Here is the point: i can go through zone 1500 easily with just idle, and then start my combo going up to 20502150 and i don't do other runs, just that type, which takes almost 35 hours. My current gilded hereos are Terra ( 73 ) and Banana ( 140 ). I really need some help on the gilding think, cause i'm always thinking if i should regild and to what hero.

I have already seen the calculator and the thumbs rule,but didn't understand so well, and the calculator puts one value for idle and another for clicking, which have left me to where i am now., since i click more then i idle.