Squids, anything from 1-3 ounces, depending how strong the wind is. I GENERALLY use 2 oz sinkers. The lighter, the better though!! When pulling multiple squids, try and keep the weight the same, as then they will tangle less, especially when there is a very strong wind blowing.
Tuna runners come pre-rigged with a sinker already attached to it. So, just tie on your hook!!
Trace length's: i use 1 to 1.5m trace lengths. Anything longer, then you can't reel anymore, as the swivel will be up against the tip eye of the rod and the fish will still be too far from you to gaff!!
Always use the smallest swivel. Try and make it look as invisible as possible.......