My final guide - what should it be?

Due to a change in personal circumstances that I can't disclose just now, I could well be short on time to write in the near future :(, BUT I have a few days left before that happens and may be able to squeeze one more HERO type guide in before then...but who should it be?

I'm written so many of the damned things there aren't that many left I can play and haven't done already.

I'm willing to have a pop at most heroes, but here are the few I haven't covered already that I've played somewhat:

Alchemist
Broodmother
Centaur Warrunner
Clockwerk
Crystal Maiden
Enchantress
Gyrocopter
Nyx Assassin
Outworld Devourer
Phantom Assassin
Silencer
Slardar
Spirit Breaker
Tidehunter
Undying
Weaver

I'll go with some combination the majority verdict and the most convincing arguments! Vote fast, as I'll have to start it soon!

Definately Undying.

Sando, I'm sad to hear that you don't have much time anymore, I hope everything is alright, in case you have any problems we can help with let us know!

I would like to see a Tidehunter guide.

inb4 Broodmother guide

Yeah I have to go with Broodmama on this one. she's too awesome to overlook.

I'd say Slardar. He's a very confusing hero to many players, myself included. People have no real idea of what his role is. He has kind of an awkward carry/ganker/initiator hybrid role, and generally people don't know how to play him. Basic questions like where the hell do I lane this freaking hero are not that easy to answer :)

Roaming Support Alchemist! Do it! Do it NOOOOOOOOOOOOOW!!!

8{(

Thanks for all the responses guys, keep em coming! And thanks Hades, really nice comment. Don't worry, it's nothing really serious, but I can't explain for a few weeks - however, it does likely mean less writing time - I will still be around the site regularly of course, you can't get rid of me that easily :)

That's sad because your guides are awesome and those have helped me a lot, but what can you do. Also Centaur Warrunner guide would be nice

HE IS PART OF A SECRET ORGANISATION!!!! I KNEW IT!!!

Undying.
He can be used in a couple of roles like trilanes or agressive dual lanes as both farmer and support and people often play him wrong.

Heroes like slardar and centaur are just blink followed up by situational items and/or utility.