I am truly a fool.  I can easily fit Tinker into my deck as I can crop rotation for Tree of Tales thus ramping up my art content.  Here is an updated list.

This isn't Oath boarding into Hermit like you want feedback on, but it is a very fast and consistent Hermit main build.  I hope this gives you some ideas

Main Combo
4X Hermit Druid
1X Sutured Ghoul
1X Lord of Extinction
1X Dragon Breath
1X Dread Return
3X Narcomoeba
1X Bridge from Below
3X Worldly Tutor
1X Vampiric Tutor
1X Demonic Tutor

Control
4X Gitaxian Probe
4X Cabal Therapy
4X Mental Misstep
3X Crop Rotation
1X Maze of Ith
2X Bojuka Bog

Alt Kill Condition
1X Blightsteel Colossus
1X Tinker
1X Vampire Hexmage
1X Dark Depths

Mana/Accel
4X Forbidden Orchard
3X Gemstone Mine
2X Tree of Tales
1X Dryad Arbor
1X Strip Mine
1X Karakas
1X Hall of the Bandit Lord
3X Chrome Mox
1X Lotus Petal
3X Elvish Spirit Guide

Crop Rotation stays my swiss army knife.  It instant speeds Land D, Yard hate, creature control, an extra dude with the Arbor, combo pieces with Dark Depths and an artifact provider for Tinker, and protection for my Druid with Hall.  I like my turn 1 to be a Probe and a Therapy if I'm holding a kill con, or a Tutor and a Misstep if I'm not.  I often manage to put out enough disruption to play my slightly slower alt kill cons which saves the Druid for game 2.  Karakas is my favorite new piece here, not often useful, but completely effective when it is.

4 Worldly Tutors and Vamp for the Druid serve me as there's little else that I search for.  Demonic has been in and out and back in and out again.  I only run 3 artifacts making Tinker difficult to rely on, but is faster and simpler than Depths.  Honestly, I've thought about running more arts for Tinker/BCS and a 4X Leyline of the Void with 1X Helm of Obedience for the mill combo.  But to put in these alternate combos I'd have to sacrifice control and whatnot and spend a bunch more money.

Wow, I grabbed the wrong decklist for my last post and I can't figure out how to delete it for a redo.  Here's the real decklist.

Combo
1X Dragon Breath
1X Sutured Ghoul
1X Lord of Extinction
1x Dread Return
1X Bridge from Below
3X Narcomoeba
4X Hermit Druid
4X Worldly Tutor
1X Vampiric Tutor

Control
4X Crop Rotation
3X Cabal Therapy
3X Noxious Revival
4X Mental Misstep

Tech
4X Gitaxian Probe
1X Phantasmagorian
1X Vampire Hexmage
1X Dark Depths

Land
1X Strip Mine
1X Hall of the Bandit Lord
2X Bojuka Bog
1X Maze of Ith
4X Forbidden Orchard
2X City of Brass
4X Gemstone Mine

Acceleration
4X Elvish Spirit Guide
2X Chrome Mox
1X Lotus Petal

Sideboard
3X Powder Keg
3X Chalice of the Void/Ravenous Trap/Surgica Extraction (I'm undecided)
3X Pithing Needle
3X Chain of Vapor
3X Nature's Claim

I have run Oath in the board, but recently moved away from it in lieu of a secondary mainboard combo for Hermit.  I run the Sutured Ghoul combo currently, but have run the Sharuum combo in the past. 

Combo
1X Dragon Breath
1X Sutured Ghoul
1X Lord of Extinction
1x Dread Return
4X Hermit Druid
4X Worldly Tutor
1X Vampiric Tutor

Control
4X Crop Rotation
3X Duress
3X Cabal Therapy
3X Noxious Revival
4X Mental Misstep

Tech
4X Gitaxian Probe
1X Phantasmagorian
1X Vampire Hexmage
1X Dark Depths
1X Krosan Rec

Land
1X Strip Mine
2X Hall of the Bandit Lord
2X Bojuka Bog
1X Maze of Ith
1X Pendlehaven
4X Forbidden Orchard
2X City of Brass
4X Gemstone Mine
1X Dryad Arbor

Acceleration
4X Elvish Spirit Guide
3X Chrome Mox
1X Lotus Petal

Sideboard
3X Powder Keg
3X Chalice of the Void/Ravenous Trap/Surgica Extraction (I'm undecided)
3X Pithing Needle
3X Chain of Vapor
3X Nature's Claim

The basic idea is to hold a tutor or Crop Rotation turn 1 to play EOT and fix your hand/board, I especially love Crop Rotating for Hall so's I can hold onto the Druid cause turn 2 with an accel you can go off and never show them what's happening.  Instant speed Tutors also protect you against discard.  I chose Mental Misstep for my counter because so many of the best disruptions for this deck cost 1 mana and because it'll stop Mental Misstep from stopping your own 1 mana spells.  Against a slower deck, I'll tutor for Hexmage and Dark Depths game 1 and then Druid game 2

I run a Hermit Druid with 4X Crop Rotation and 3X Noxious Revival.  I can Crop Rotation for a Hall of the Bandit Lord which lets me keep my Druid in hand till I'm ready to combo OR I can Crop for Bojuka Bog to remove their yard after their first use of Bazaar of Baghdad.  Crop Rotation also lets me silver bullet Strip Mine, Maze of Ith (great in the mirror match), Karakas (this card is just dirty), Pendlehaven, Tabernacle, or any number of effective cards.  Similarly, I can Noxious Revival to recover a countered Druid ect, OR I can Noxious Revival the Flame Kin Zealot in response to Dread Return.  This gives me 7 instant speed 1 mana or less mainboard graveyard hate cards that also protect my deck.  Dredge can recover from those no doubt, but typically not by turn 2 and often not by turn 3.

Thanks again for the thread and I hope this helps

Since we're using crop rotation I have some land to consider.  1X strip mine, 2X Bojuka Bog.  This will give you instant GY removal and LD without seriously affecting your deck.  Then with the Leyline of Singularity, you could mainboard Chrome Mox for doubles of Leylines in your hand.  I would also recommend Sterling Grove as it protects your enchantments as well as searches for them.