Lil Rhyme.4153

I've seen posts in the past about WvW commander classes, but I've recently gotten interest in doing HP Trains and help with map completion and events. Is there a "best" class for this? My thoughts are Guardian or Mesmer. I've played Mesmer before and I think having the ports would be handy for non-mounted players. I've never played Guardian but I'm taking an interest in it and have heard good things over WvW but I'm specifically looking at PvE purposes. I'm open to other suggestions as well!