Kath's ability is amazing. Anything that adds extra attack dice will be feared and rightly so. You'll want Engine Upgrade to ensure you can position her where she needs to be in order to be at range 1 of the opponent to gain 5 attack dice from her auxiliary firing arc.
K4 Security Droid allows for a target lock action onto the target whilst Dengar is solid for re-rolls all day.
Push The Limit is great on Kath, however with only 4 green manoeuvres it becomes predictable for the opponent and she eventually will get caught so the key is not to use it every turn. Veteran Instincts allows her to move and shoot at the respectable pilot skill 9 level.