Sig Stone usage (story of a noob...)
When the 5* started rolling in for me, I picked out champs that I thought best for each class. At the time, I thought it was a good idea... Looking back now... I was stupid...
Mutant - used AG and 79 stones on R4 Iceman (80), and then same for Omega (80). Have R1 Namor (20) with 65 unused stones.
Cosmic - used 80 stones on R4 medusa (140). 105 unused stones waiting for Cap Marvel
Mystic - used 80 stones on Magik (140) and AG + 79 generic & 20 class stones for sym supreme (100). 103 unused waiting for Doom (or considering just investing in SS).
Science - used 60 on Thing (80) and then AG + 79 stones on Void (80). New CAIW (1) with 57 unused stones.
Skill - used 80 on Blade (140) and then AG + 109 on Aegon (110). 0 unused.
Tech - used 80 on Ghost (120) and then AG + 119 stones on Warlock (120). 15 stones for Warlock next item use.
I guess my point is that if I was more careful with my sig stones, I'd have a much higher prestige that could attract other ally's. But instead, i have several champs between 80-140. Ugh