Nice stats. Personally, my answer to "Time to upgrade your cards?" is "Not until you need them." Unlike Splinterlands, upgraded eXode cards cannot currently be combined (understandable due to the different upgrade paths). Like Splinterland, upgraded cards can't be split. It would be awful to use most of your cards of a given type to heavily upgrade, for example, one weapon only to realize that you want all of your second or third colony armed.
The best use for the 2nd rarest max upgraded card is to send it directly to the reward pool as a boobie prize.
Upvoted x3