Yikes. Bloody good question.
1) Out of habit, I turn my filters OFF for 3min of feeding. This has been valuable when I've had to catch a fish, including SAEs. Filter off = fish all come front and center.
2) Not only one large mouthed net - but two. Need full good clearance of all tank surface. 2 wide mouth nets, one in each hand. Bait with food, blood worms, possibly sinking pellets which will attract attention at floor for more than a quick dart and retreat.
3) Put on some Yanni. Patterned breathing. Patience.
growitnow