1H axe / 1H dagger / 1H crossbow, every weapons with good clear for PVE, i'm using bear paws since i was ganking at the same time + fighting on chests sometimes too, but it's not the best
I can't really tell you, it depend of the timers, sometimes on T7/T8 there are too much ganksquads while 2/3 maps around portal are safe, sometimes it's empty on T7/T8 maps but full ganksquads around portals, so.. you should try by yourself but always stay focus on the sounds around you while doing the boss with your mount next to you 👍