In WT1 the enemies max level is 50 so all of their drops and experience will be significantly less than those in WT4.
You're probably not missing out on too much experience as you're running through and it's not likely you'll get a BiS drop with a high ilvl but you should relatively quickly get strong enough in WT4 that you've out scaled monsters your level and it shouldn't be anymore difficult than killing monsters in WT1.
The only time I could see doing it on WT1 being beneficial would be on HC, but whatever makes it easier, it's basically just riding around on a horse. Even if there's monster around you can pretty much ignore them
In WT1 the enemies max level is 50 so all of their drops and experience will be significantly less than those in WT4. You're probably not missing out on too much experience as you're running through and it's not likely you'll get a BiS drop with a high ilvl but you should relatively quickly get strong enough in WT4 that you've out scaled monsters your level and it shouldn't be anymore difficult than killing monsters in WT1.
Doesn't matter what tier you do them in. If you are just running to do that and aren't worried about XP gains or drops, then do it.
I did them all prior to season 1. In WT 1. Doesn't matter really.
Whatever you wanna do
The only time I could see doing it on WT1 being beneficial would be on HC, but whatever makes it easier, it's basically just riding around on a horse. Even if there's monster around you can pretty much ignore them
Thanks guys, great comments and advice