We use the same size reels for wireline and downriggers when fishing for kings. We use 30lb test for riggers. I believe it's better to have a little more reel than you might actually need especially for bigger kings. We use the newer model Daiwa Sealine 47 line counters for those applications. If we're fishing only browns we go with the Daiwa Sealine 27 line counters with 12 to 15 lb main line. I'n not sure how the 30 and 40 Saltist reels match up with the the 47 and 27 Sealines as far as line amounts for each model.