Hello. Upon receipt of my next d-blade (after next rare quest), I will be taking Guinevere from 3/70 to 4/80. I am currently stockpiling recruits in TC11 for this purpose and will use TC 19 to create any remaining heroes required. I have about 800 recruits in TC 11 now.
How many recruits (approximately) would be needed to go from 3/70 to 4/80 assuming you start with 0 heroes in your inventory?