This works especially well with servers that have renown bonuses 20%. With the new patch you get 150% rp in bo's and keeps.
Throw on any bonus renown gems you have have got from events.
So with rvr zone and bonus total at 270% with bonus, slap on your +% bo renown tactic and your gem and its maxed out.
Ok so find a friend on the opposite faction(higher rr the better).
Meet them at a bo somewhere.
The first kill you get 100% then it degrades on the 2nd and 3rd kill.
Relog and it resets!
Rinse and repeat for serious gain.
Also you get crests off of each other.