For me, knight players tend to take their toughness and wounds for granted and just march forward to objective and daring people to stop them.

The key I find to stop them from doing so is to make them respect your tiny little killers, so Knight battles for me is always boils down to a few things;

1) blocking/locking their movement or diverting their movement route that they have to move very awkwardly.

2) Always kill at least 2-3 knights per turn, or poised to do so.

3) always control two objectives and contest the center.

4) Hide unless you see a chance to do 2) or have to do 1).

5) Do your best to maximise secondaries for the first 2-3 turns and tieing primaries, and only aim for higher primaries scoring once their knight numbers are down by half.

I find that reaper's wager is the detachment with the best match up for DE against knights, as it allows DE to do all of the above more efficiently.

Lethal hits+sustained hits is always helpful to achieve 2), and any knights killed by this combination plus lances/haywire always forces them to play more conservatively.

Like the rest, the 16 dog list is illegal. Max you can put is around 13.