@nba84 The plan of "I'll just win by casting my dude" is much stronger. Griselbrand is too hard to cast and Salvagers don't go anything without Lotus and something else. With Titan you won't combo out to win on the spot, but you've got a big body and you're likely to get significant additional value.
In general, I don't think you can play Oath without a viable plan B. Show and Tell isn't as good anymore because of the popularity of Containment Priest. So I want to go another direction, and I think Sun Titan is one of the better options. The Salvager/Griselbrand deck doesn't have a viable backup plan without playing more black tutors than most builds typically can without decimating their own mana bases. It can just Oath straight into Grafdigger's cage, but it needs removal against other forms of hate. That's not as strong of a plan because hate can appear in duplicate or triplicate and you therefore need just as much removal - a much tougher situation than just casting one good spell.
(Edited like 6 times for clarity)