To offer some perspective, Steamer600, which assumes 200 innings for each starting pitcher, projects these 2018 WAR:
5.5 Chris Sale
3.8 Gerrit Cole
3.7 David Price
2.9 Rick Porcello
2.6 Drew Pomeranz
2.6 Eduardo Rodriguez
http://www.fangraphs.com/projections.aspx?pos=all&stats=pit&type=steamer600&team=3&lg=all&players=0&sort=19,d
http://www.fangraphs.com/projections.aspx?pos=all&stats=pit&type=steamer600&team=27&lg=all&players=0&sort=19,d
Only Sale, Cole and Porcello tossed 200+ innings this year; none of the others exceeded 175 innings.