Hi guys lemme put my feedback here too i been playing for close to 2 years now but I'm not in a rush anyways and i am also a f2p player the picture will say it all.
Just keep in mind I always do my daily quests also watching ads for the free tokens and of course the special events like portals and etc also I always farm titans since the points are very useful to buy 30 level epic boost kit.
So most parts needs epic relics to upgrade to Divine and you can get them from the followings clan war boxes rank 12 arena boxes and sometimes from premium pack.