HK is misleading. It's actually Honor or Contribution Points that determines rank (actually, it's Rating that determines rank, but there's no way to check Rating in the game).
The problem with AV is diminishing returns. Killing the same player repeatedly eventually gets you to a point where that player gives zero honor for a kill. So you only get Honor for about the first 200 HK in an AV game, assuming it's the same 40-man opposition throughout. Although, if the game proceeds long enough, the DR timer can reset, and you'll get more credits.
AV games are bad for Honor. AB or WSG is better for rank, because of the bonus honor rewards for each victory. AV has the best faction rewards, though, for a lot of classes.
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The problem with AV is diminishing returns. Killing the same player repeatedly eventually gets you to a point where that player gives zero honor for a kill. So you only get Honor for about the first 200 HK in an AV game, assuming it's the same 40-man opposition throughout. Although, if the game proceeds long enough, the DR timer can reset, and you'll get more credits.
AV games are bad for Honor. AB or WSG is better for rank, because of the bonus honor rewards for each victory. AV has the best faction rewards, though, for a lot of classes.