In my experience Oath is one of the worst matchups you could have playing Stax (in any form)
Your gameplan is slowing down and locking your opponent out. Oath doesnt care about mana in play as long as it can resolve Oath.
The same goes from Ichorid (or dredge or whatever you want to call it). It just laughs at your lockpieces because they really dont have to resolve any spell if they can Bazaar a couple of time to get the dredge engine going.
If your meta is infested with Oath and Ichorid you might want to reconsider your deckchoice as Stax isnt really fit to battle those decks.
If you still want to play some workshop deck with Leylines you might want to try something like
Obeyline or a Gilded Claw variant using Leyline of the Void + Helm of Obeydience. I've been messing about with a Gilded Claw deck using Leyline, Helm and Entomb...
Just for fun here's the list... no tournament data available because I havent played it in a tournament yet.
4x shop
4x cob
3x gmine
1x tolarian
1x strip
1x bazaar
1x urborg
3x wasteland
5x mox
1x lotus
1x sol ring
1x mcrypt
4x welder
1x gshaman
1x sharuum
2x trike
1x titan
1x karn
3x entomb
1x crop rotation
4x leyline
1x helm of obey
4x sphere
1x trini
1x mjar
1x glotus
1x crelic
1x balance
1x cow
1x demonic
1x vampiric
1x tinker
1x arecall
4x chalice
/sb
2x reb
1x pyro
2x platz
1x dupe
3x neelde
3x ray of rev
3x acient grudge