How do I add a couple of trackers to be automatically added to any new torrents I open?
There used to be a easy option where i could just copy paste the list in setting>transfers>trackers but this seems to have been removed in one of the latest versions

There's still that option

Settings -> Transfers -> Trackers -> Individual Tracker Options -> Edit and add the trackers.

not removed, just made more customizable, but not that hard

trackers->edit

tracker url
add_to_new

if  you want more in same group you can use

tracker url
add_to_new_last_group

dont forget blank line between each rule (2line set)

help page http://support.tixati.com/individual%20tracker%20options

Can you please give me an example?

Also can the current tracker url be added? There is a very nice Github project. https://github.com/XIU2/TrackersListCollection