I use 2 lb on a couple of my rods with good results. I’ve fallen deep in the hole of braid and most of the rods in my hand lately have that on them. Size is between .15 and .2, with strength listed as 4 to 5 1/2 lb test. The mono I use most lately is the Varivas Twitchmaster in 3 and 4 lb. I’ve fixed NiNo up with 2 lb on one of his rods and he uses 4 mostly because of availability. He did just get a 300 yard spool of P-line flouroclear in 2 lb so I think he’ll be using that on more of his reels real soon. In the mono, I think of 4 lb as the heavier tackle that I use around abrasive structure. I’ve just fallen in love with the casting and sensitivity of the braid myself, but the light mono also has its place.