Hero Development: DD and Medusa

I've been working up my Dread Drake, exploiting his Enlightenment 1 talent.  I got him to evo1 199, with most of the experience for 200.  I have one dupe, and although I could afford the 40000 shards (barely), I figure he's high enough for now.  I'd rather spend the shards on getting his talent to 9, or elsewhere.  I'll wait for another dupe or two before evo2.  As I was almost to 200, I happened to get a pretty nice talent in a quest reroll:

Not bulwark, but not bad

That's a sign.  I zeroed out my dungeons and HBM for the last burst of experience, then I replaced the talent.  DD now is quite nasty in toe-to-toe combat, using Bulwark 4 crests.  Very hard to kill.

DPS queen to be

Now I've started working up Medusa.  She's got Enlightenment 3, so she's going to evo0 200 now, and then to evo1 200.  I have no dupes for her, so I'll have to pay shards unless I get lucky pretty soon.  20000 shards for evo1 is pretty much always worth doing for a top shelf hero, and that goes double for a hero getting Enlightenment boosts.  It's a lovely talent, but you don't really want it there unless you're actively developing the hero.

I am still above 400000 HB.  That is with selling 600 of the green books but no others.  I think there may be sources of HB that I did not count, since I am nearly keeping up even with Enlightened heroes.