I thought Ambra sucked after her post Beta nerf...
...I now really like Ambra, lol.
Getting the heal beam that takes her life, but heals others, is pretty solid. Basically makes you another flavor of Miko. Her ult is so clutch when you place it behind the enemies of a team fight, and getting a universal stun (or Fiery Remains) on all of them once you reach 10 is great.
Also, setting sunspots all over the field (in enemy waves, behind walls teammates will hide at, near sniping spots of enemies, etc) will get you assist all day.
I don't think I like Solar Wind at all without burning. That just seems to MAKE the move as an offensive ability. Without that, you should just level it as a utility (with pushback) all the way.
Letting Allies Absorb sunspots, or having them explode, just doesn't seem as good. The persistent damage disappears if they can expire early. And if you're going to use the rod to heal, you don't want what's helping heal YOU to disappear early.
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Every match of this game is so different. You have some where Ghalt is the defining reason why a team wins. You have others where he's always caught unaware and gets roflstomped. Having AOEs like Oscar and Thorn turns poor Galilea into a feeder. The only thing that never changes is that Rath's knock into the air with his sword wave is ALWAYS useful, lol. He's pretty much the best answer for camping groups and people who really dig into a territory.