I would love to war against Undead/Rogue(s). I´m Halfling/Rogue and we did eat another Halfing/Rogue last war. He was not very well pumped I must agree. But it seems it´s easier to prop a rogue than some TM who have WT in their build but much lower tpa because prop gains on Rogue are huge. So I would take long time to think about it first. A Halfling can destroy you with a single run.