Anxiety doesn't necessarily cause concentration problems as its own symptom. In fact, it could be argued that anxiety actually improves concentration. Anxiety is the activation of your fight or flight system, which is meant to keep you safe from harm by ensuring you're running away or fighting without distraction.
The first set up is a standard 20-25 pound test rig (depending on the size of the tuna) with a size 1 to 2/0 hook depending on bait size and the size of the tuna. Fluorocarbon leader can be super effective if the fish are touchy (biting infrequently). This set up will be the primary bait fishing set up.
Giant Tuna Line. Tuna can be notoriously line-shy and for this reason all chunking is done with a 100-200ft 130lb mono top-shot backed with hollow braid of equal or higher rating (typically 200lb). The thinner diameter of the braid provides significant additional line capacity.