A Martial Arts Assassin can certainly do hell difficulty, but I'd have to say that a Trapper is more effective.
Non-immunes are fine. Lightning Sentry will rip them to shreds.
For immunes, you can use Death Sentry (which has a built-in corpse explosion). You can also put points in Fire Blast if you're having problems. Still, all you need is one death in a group and corpse explosion will take care of the rest. --- Can a first timer play this game with hard on?- wpninja
Ok... But what skills in trap should I focus on maxing, and which should I prioritize in maxing first?
Lightning Sentry Death Sentry Charged Bolt Sentry Shock Web Rest in Fire Blast if you need it Maybe a few in Claw Block if you're going dual-claw 1 in Burst of Speed (you could maybe go for Fade but I imagine you will need the Ias from BoS with low-average items) --- Can a first timer play this game with hard on?- wpninja
I would say the above post is best too...also Shadow Master can help you tank monsters, but yeah, Fire Blast gets synergized by all those Lightning Sentry synergies, so it can become pretty powerful, and synergizes Death Sentry. When it's maxed will do best against single lightning immune monsters, seeing as it will still only do about 2k with just 1 point invested and ideal +trap skills from gear and charms, so if you have average gear with not many +skills, I would suggest maxing Fire Blast. Even with ideal gear, it's still a great option anyways since lightning immunes are never welcome.