you cant get nemesis bonus with this method..
in my opinion, the best way is to kill 50x-75x-100x the same player (medics to do revives) then switch to another player.
Always so. might be able to 500 points for every two kills after 8 killstreak.
Killstreak 8 - 500
Killstreak 10 - 500
Killstreak 12, 14, 16...
this is my opinion