For the fish you are chasing I would stick with 8lb as this gives you a chance of landing a monster flattie if you hook into one. If you are bait fishing you can use a swivel and tie a mono leader to it - if however you are flicking plastics then learn how to tie albright knots, uni knots and bimini twists as you will need good knots to tie braid and mono together. Personally I use a 50 twist bimini in the braid and then tie the mono leader to it with an albright knot.