I know a lot you try to keep track of what heroes you have received from TC20 and probably have your own methods but I developed a spreadsheet that hopefully makes it much quicker and easier to note down (literally pick the hero from a drop-down). It will also give stats based on element and rarity for each training camp and for all TCs combined.
To make it work you’ll need to save a copy… if there are any bugs or suggestions please let me know.
(screenshot is my first TC which had a fairly strong start!)
Update 16th September 2020: