Best option to spend 1500 rubies?

Hi forum!
I’ve collected 1500 rubies and now have to choose some boost package, but I’m not quite sure what color I should pick. Can some give me some advice?
Here is my current setup: (Horgal, Perseus, Ares, Sartana and Musashi)

Aren’t boost packages only good for beginners without advanced heroes?

Oh. NVM. There are amulet for summoning random heroes. There is no difference what to buy. :man_facepalming:

All I can think here is continue to feed your heroes as you have been, and spend your gems trying to catch a 5* yellow troop.

Longshot, but those 1500 gem packages will be a very small snack for that roster