Don't over complicate catching sea trout with boxes full of flies. You only need a couple of patterns in various sizes, and fish them with confidence. Spend half the night with your head in a fly box because there are fish showing all over but you get hit them is a guaranteed route to failure. I only use 2 or 3 patterns all season, black and yellow tube, butcher variant tube, and this, which has accounted for quite a few double figure sea trout and is consistently my most successful pattern, and NEVER off the dropper.
GP tail, gold oval rib, gold tinsel body, red cock throat, crow wing, JC on a salar 8 or 10.