I have spent at least 20 dusk/dawn cycles in the last 5 days sitting in Iron Marches for the Ascalonian Fisher. Not even the Avid yet. I've used roughly 1k lures and the same in bait, and have yet to drop Muskellunge. After 6 consecutive hours in Iron Marches, I sent a ticket in and an in-game bug report.
First response: "We ask that, when possible, you reattempt to catch the Muskellunge again. If after attempting to catch the fish again and you still are unable to catch it, we then ask that you submit an in-game bug report."
Two hours later, still waiting for my 5 minute chance. In which I get 3 fish per node, and maybe 4 nodes or 5 starting in Bloodfin Lake.
Second response: "Thanks a lot for taking the time to share your ideas about increasing the drop rate for the fish in question! We ask and encourage players to post their ideas in our forums."
On my next Dusk cycle, I caught the elusive Muskellunge. But it took TWENTY ONE separate 5 minute windows. In my last attempt, in the 5 minute window, I caught 12 things from 4 nodes, 1 trash item, one partially chewed box, and 10 fish. 1/10 was the Musk, 10% chance. Out of the 12, 8.3% chance. But, if you use that math for 21 cycles, maybe average of 12 fish each dusk or dawn, that's 1/252 chance, 0.003 drop rate.
The Ascalonian Fisher collection has two Dusk/Dawn fish, the legendary to me seems like the impossible fish, unfair to be stuck in a 5 minute window. Especially considering a 0.003 drop rate, and you have to do the collection twice. All of this was done at 875 FP, using Fish Pancakes and a maxed out Fishing Party buff, and Jade Lures. I could have used the Tips on Fishing for an additional 50, but I would have to leave every time it ran out, and lose my Fishing Party buff.
Please increase the drop rate for dusk/dawn specific fish. A, I should not be fishing up trash items (Broken Fishing Hook) at 875 FP. B, if you do increase the rate, let us know the real numbers, not an arbitrary increase. Ex. "Increased legendary fish drop rate from 5% to 8%." Not "Increased legendary fish drop rate by 5%".