I've found that Deathtouch doesn't work as often as Stonetouch. The stats won't reflect that, but personal luck does. You'll still want the Ice resistance for the Ice loving enemies on the way to the Temple. Gotta love those Floating Eyeball type enemies, especially with Confusion and AOE attacks, but fortunately for you, Stone and Death will still work reliably until the Calm Lands. After then, it's all about luck unless you get a Stone/Deathstrike Weapon, which I'm fairly sure you can obtain by then.

Seymour is going to be interesting, but not necessarily difficult.