I was just curious about some numbers currently in the game, so I made some assumptions and calculations. Here they are:
The general idea is you want to build an all-myth mech, and you do not have a single legendary. Hom many epics do you need?
To craft 1 legendary: you need 1 maxxed epic + 4 sacrifice epics = 5
To craft 1 myth: you need 1 maxxed legend + 5 sacrifice = 6 x 5 = 30 epics
A typical mech with 4 weapons, utility outfit (hook, drone, charge, I assume no tele) plus 7-8 modules needs about 17 myths.
17 x 30 = 510 epics.
So you need to get 612 epics just to build 1 (ONE) fully-mythed mech. And for three.... well you need 1530 epics. Not bad, not bad. Think about it the next time you burn an epic for some fusion points....