Guide- how to most efficiently upgrade heroes

Disclaimer- what i mean by efficient is what i believe the perfect balance between upgrading heroes while having enough offensive strength to do wars so you can farm ores too since they are as important as hero levels if not more important

First thing is splitting heroes into 2 categorys one is priority heroes which are the heroes your attack strategy needs to be effective (for example if you use a queen charge attack then the queen is a priority hero)

And the second one is non priority heroes who are replaceable by other heroes (like if you do a fireball super witches attack it's most common to send the king in the core and the queen to funnel but other heroes can tag with them like using queen at the core and king to funnel or king at the core and MP to funnel)

Then you alway have 2 builders on the heroes 1 on a priority hero and keep it upgrading all month except for CWL (if your hero levels are quite low compared to your th then avoid upgrading your strongest hero untill you get the others to a decent level) the other builder on a non priority hero which is a hero that is replaceable by another one and it will not effect offensive strength much

That leaves you with 3 heroes which is enough to easily 3 star someone of the same th and potentially of a higher TH im th 14 and been upgrading RC and king and been 3 staring every th 14 and some th 15 while my other heroes levels are about th 12 levels

Also some tips to upgrading your heroes faster is utilizing magic item like don't max the highest upgrade time hero but leave it 3 levels from max so you can get the most of your books and save any builder potion you get untill you have 4 or 5 then upgrad as many heroes as you can before using them all to minimize the downtime for your heroes and finaly spend any spare gems to the builder apprentice and always keep him on heroes

u/congressmancoolrick I've had this on my mind a while ago but i guess I needed a little motivation to finish it