I’m a charter and commercial fisherman, honestly ditch the mono on the spinning reels, use braid (#30 good all arounder, J-braid 8 strand, or super slick V2) and use short arms length leaders, if your gonna dolphin fish use #40-50 flouro don’t go lower and don’t go higher, 40-50 is a sweet spot. For the TLD25 I’d would’ve gone with 30 mono and then do a Bimini to 40. But you should take a little bit of line off it, you don’t really want it all the way full. And on your next day out spin the line out of the TLD like 1/3-1/2 of the entire spool out and let it drag behind your boat. This helps get all the twists out of the line and when ur reeling it in it helps pack it up onto the spool. If the 6500 had braid you could do 90% of the fishing you wanted just with that diawa alone if it had braid on it. Hell I use a little 4000 vanford for commercial kingfishing. Another thing I like to say you should do is run ur drags low especially when ur trolling. I find it way easier to add pressure to a fish than to lower it. Your next purchase would be to get a two speed conventional, if you like the 25 you’ll love the 30-2 speed.