Go with "known and trusted" till "known and trusted" don't work, then change it up a little. But prepare for the change. That's what you plan for. Plan to get out the rut once "known and trusted" fails you! Sounds simple, but I know, ain't as easy as it sounds.
But here's one thing to remember. Be impatient! Yes I said it. The best fishermen I know are impatient. They do "known and trusted" for only a short time, then they go to Plan B, then Plan C, then Plan D.....and so on.
Good luck.