The first time I went out to the 300m mark was with 50lb mono and You didnt have a clue if anything was on until you wound the reel handle bout 50 times to take the stretch out and then it was like a big rubber band.
Changed to braid and it was like fishing in the river, just a bit further to wind up
Electric reels are what bug me.! Anyone can sit there & have a cup of tea or whatever whilst the reel cranks away by itself , and then it stops winding or beeps so you can put your scone and cuppa down and wind the last few metres
Can feel every bump with Braid. Use a 100lb mono leader on dropper rigs( 40lb to the lead weight) out deep or 80lb plastic coated 7 strand wire for jigging with 80lb braid mainline.
One of the benefits of fishing braid out deep was that there was less line drag.
Been having fun in the last few years going out to the 32fathom to 42fathom with a lighter procaster rod,20lb braid on a Penn Slammer 460 reel and rubbers or bait, Much fun!!!
I have one river rod with mono on it and thats for Katrina so she doesnt cut her fingers.
Cheers.