Guild Wars 2

Hello,
A friend of mine is playing an engineer and using the build found in Masks 10th vid post https://forum-en.gw2archive.eu/forum/professions/engineer/Mask-s-10th-wvw-vid/first#post1833684 or at least very close to it, missing the monks runes.

Have a second engineer who is about to start WvW with us and could use some help, getting a build made and with choosing the right gear and such.
To be honest I am thinking of making an engineer as I am not having much luck with my main. Thank you for all the help, the engineering forum folks have been great, it is appreciated.

EDIT:
Mainly solo roaming or small group. If we are able to get together our group is now looking like the following.

Ranger or Theif (Me although lousy player so not sure I should be counted)
Ranger speced BM
Engineer newly 80 using masks build.
Is the core small group with super rare additions of a
Ranger or Guardian (They mainly play their ranger although have not been on a while)
Upleveled Mesmer (lvl 60 currently)

The draw back is we do not play often together so should really be looking at single roaming builds as our cooperation is lacking atm…we are working on it. I will be running with the engineer more although am horrible on my theif and just so with the ranger.