RE Chromiums: the issue with Chromiums for non-whales is if you don't put in serious $$$, you're just going to be left with a bunch of 3-5* heroes with no point in using them. Congrats, you pulled a Leia at 3*, she'll be absolutely pointless since you can't farm her elsewhere. You either buy more packs or your SOL.
Yes, there's a chance or pulling heroes you can farm and get a headstart/boost on... or you could spend that energy on refreshes. It's really not even close IMO, unless you're dropping money consistently on this game you simply should not buy chromiums ever.
My Arena order would be:
Sidious > ST Han/Ackbar > Oppress > IG88/HK47 > Asaaj > Greedo/Nute > Eeth > CUP/Ugh.
But honestly, anything past sidious is pretty up in the air and even he isn't 7* necessary.
Yes, there's a chance or pulling heroes you can farm and get a headstart/boost on... or you could spend that energy on refreshes. It's really not even close IMO, unless you're dropping money consistently on this game you simply should not buy chromiums ever.
My Arena order would be:
Sidious > ST Han/Ackbar > Oppress > IG88/HK47 > Asaaj > Greedo/Nute > Eeth > CUP/Ugh.
But honestly, anything past sidious is pretty up in the air and even he isn't 7* necessary.