Yes, level is key as you can't get a crit failure if the lull succeeds. But I find it helpful to carry a crude stein (+15cha). It's pretty quick and easy to swap a single item to make critical failures less common. Also Kaev is a half-elf paladin rather than the over-popular dwarf, so his standard gear + the stein has put his cha at/over 120 for much of his career and crit failures have been pretty rare except when I've been lazy about the stein swap in my experience on p99. It's a nice feeling when you stick a lull on the fourth try.
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