My regular Heals are between 40k-60k (don't even use this much, as anytime I might normally cast it, I just Smite something.)
My Flash Heals are between 75k and 125k.
My Greater Heals are between 90K and 135k.
edit: in full Tyran pvp gear.
When my Flash Heals "crit" they are often lower than a non "crit" Flash Heal. This happens ALOT.
Last season, there was a huge difference between Flash and Greater, other than simply cast time. My Greater Heals could crit for up to 400k regularly, and 450k once or twice. Now I am not saying this should be the typical Greater Heal crit, but it sure would make ALOT more sense if a "Greater" Heal was noticeably quite larger than a Flash Heal.
It is just weird to me that these 3 heals are arranged in order of size, with the middle sized heal being "Flash" and costing a buttload of mana and being not that much smaller than the "Greater" variety.
It's just not very elegant.