Totally agree with using tackle that you land the fish you are targeting, however that is laughable when b.s. of 40lbs is being thrown around, OTT is what I class it as, using lines as per conditions and requirements is good angling, the crucians that I've caught this year have been caught on 0.10mm hooklengths, why, because the buggers don't bite on heavier and 0.12mm results in half the bites, which when some days you are talking about getting three in a full day that isn't viable, to me at least, this is also going on the fact that majority of mono's break at above their stated b.s. , fishing for chub with 10lb plus line doesn't interest me, nor does catching 2lb plus roach on carp gear, as I've said, we are all different, strange though, I don't get broke often, balanced tackle is key I feel...
I have some quite thin 12lb mono, forget what brand. It is a nice line to use, thin for its breaking strain and actually breaks at 16lbs with a decent knot!
Most braid lines break at far less than their stated BS, quite the opposite of monofilament "nylon" ratings. The only reason I mention breaking strain here is as so many anglers quote that rather than diameter. Until you measure the braid and try a few knots in it, tested with scales, the truth is not known. With the wrong knot any line will break at far less than what the manufacturers quote, Braid is vastly overstated for its strength advantages in that respect!
That's why I ignore the diameter and bs the marketing boys advertise! It's taken me a long time to work out myself but I reckon .2mm braid (measured by me!) of a reasonable quality gives me the strength and small diameter to allow me to cast a good load without a "casting" leader. That diameter braid is also thick enough to allow a couple of strands to be chafed through and still leave me with enough strength to play a good fish to the net.
When we think we are playing a fish against a heavy drag and a doubled over rod we are only applying, at best, a few pounds of pressure on the hook-hold! Get a mate to take the end of your line attached to spring scales, then bend your 3.5lb carp rod fully into it and I doubt the scales will register more than a couple of pounds. You, with the rod bent, will think you are applying considerable pressure!
Really, those big fish that rocket off against your bent rod......they are not fighting quite as hard as most would think!
So many reasons to ignore the quoted breaking strain of any line. Pick a line that will cast your chosen loading, a line with abrasion resistance that copes with your fishing situation and, of course, a line that is comfortable for the way you fish.
Then the weak point always ends up being at the hook.