Key gear for high power, Defense and MF?
If you have enough laurels you can buy yourself a 20% MF utility infusions, plus guild banners, plus MF booster, plus omnomberie food – that should keep you at 100%. On the rares/exo pieces I’ve seen at most 7% (3 from trinket and 4 from jewel), maybe there’s something with more MF, never checked TP that carefuly.
On the other hand – IMO if you run in MF set you want to maximise your output so you’ll be buying everithing specced for MF and run in events with large pool of mobs and decent amount of people. You don’t need that much dps since foes are melting before you can tag everyone
I don’t think what you have heard is true, though. Magic Find is effective at whatever percentage, just less so or more so depending on the percentage. It doesn’t just start working at 100%, or 200%, or 400%. Having 100% is twice as good as 50%, that’s true; but, having 200% is twice as good as 100%, as well. =)
The way I got to 100% (without temporary boosts) is 60% Superior Runes (5 x Traveler + 1 Pirate), the laurel Sygyzy Amulet with the 20% Magic Find infusion for 24% (50 laurels), and 2 Opal Orichalcun Rings of the Explorer for 14%, plus another 2%+ from another item (for my main character, a Quiver of a Thousand Arrows). That leaves plenty of points for power and defense and I’ve taken this character into dungeons and WvW. Warning, high end dungeon groups frown on Magic Find gear.
The reason to want to hit 100% is that it won’t ever be rounded away and neatly doubles the odds. With a Guild Banner boost, food, a Magic Find booster, and a Superior Sigil of Luck, I can get another 100%.
I used to farm the pent/shelter/jofast rotation, before Anet hired Mark McGwire to beat it with a nerf bat.
I had a MF(170+% MF total) set and my PvE set..always used omnom bars and guild banners. I would switch between the two and didn’t really notice anything different. I seemed i did better with my PvE set with just a omnom bar…