What characters to use for Cow running?
Recent tests showed there are plenty of characters you could use, you just have to pick:
Javazon, Nova necro, Summoner necro, Blizzard sorc, Lightning sorc, Nova sorc, Fireball sorc, Fissure druid, Hammerdin, Trapper...
To read more about my tests check
this post. In general I recommend whole thread for reading since it is full of great info. There are more tests done by other members as well. Here is some idea what to expect:
Potentially best runners: Javazon, PN/Nova necro, Summon necro
Great runners: Nova sorc, Blizzard sorc, Trapper, Fireball sorc
Could be very good: Fissure druid
Some characters are not yet tested like Lightning sorc, but I'll update this table with time. Idea is to present some numbers character can achieve. As you can see, you have plenty of characters to choose from. Which one is the best? Depends on your own playing style! Best results I know of come from p7 Javazon which means she could be the queen of cows. However same is not true for my own playing style, I achieved by best results with PN/Nova necro instead. So, depends on your playing style and your gear. For some best is Javazon, for some necro and for you might be Nova sorc. Who knows! I'd say most important factor for running cows is to be comfortable running and enjoying the experience to keep going.