Maybe you should splash in some double mana, and play some Land Tutors and Balduvian Frostwakters just in case if an opponent sees your tactic and tried to counter
Life/Death. Maybe you put Diabolic Tutors for land tutors, but its too pricy man.
And i love how you combine this with the black-green color since even without
Dark Depths tactic, you will still have a chance, but ure pickings for the green-black hybrids needs to be fixed man. i'll help you with these. This deck can be pretty solid if you have a solid green-black deck to back it up.
My guesses are like this: (you HAVE to splash some islands for the
balduvian frostwaker 
)
-3
Diabolic Tutor-4
Nettle Sentinel-4
Odious Trow-2
Stalker Hag-2
Doomgape-4
Drain the Well (doesnt fit your theme)
-2
Canker Abomination+4
Sudden Death (kills an
ashenmoor gouger)/
Terror(kills a
vendilion clique)
+4
Devoted Druid+4
Quillspike+2
Rendclaw Trow+2
Creakwood Liege+3
Wickerbough Elder+2
Damnation (just a bomb before you unleash your
dark depths)
Lands:
4
Dark Depths9
snow-covered swamp9
snow-covered forest4
Twilight MireSo the tactic here is either:
Devoted Druid +
Quillspike = infinite damage which will mentally scares the enemy and make them either spent all their
burn spells to these 2 mana-creatures, or
well theyre dead. (well u have to kill chump blockers first though)
Green-Black creatures =
Wickerbough Elder for destroying those enchantments (bitterblossom, edge of divinity,
blowfly infestation and all that jazz).
Creakwood Liege for main siege weapon, and the Rendclaw Trows as your chump blockers and attackers. With the help of the liege, he'll be a 4/4 Persist, Wither. Just eat the -1/-1 with quillspikes and he'll be there again and again and again..
Odious Trow is bad in every kind of way.. Woodlurker for early strikers.
Seedborn muse is for defense i think
Damnation +
Dark Depths +
Life/Death +
Fate Transfer = your AS card man. Just
damnation! then no blockers will be there then
life/death the depths, and
fate transfer it.
well if u happen to run in any counters or whatsoever.. haha... then DONT use
damnation... its just for style and for fun..
Oh by the way, can you comment on my deck, its called "U/R Type 2,for Ptq" im using it for the nearby PTQ in indonesia. can u help me giving it feedbacks, i really need some, thanks again man. good deck. i really wanna see it in action.
When you guys comment on my deck, I'll surely return the
call. But though, I'm hoping the same when I comment on your deck

...its always constructive, believe me.
Here's my current "comment-needed" deck. "Anti 5-Color Deck T2 NON BUDGET" Thank you.