Drop Rate. Accessories with 1% additional drop rate. You can get a total of 30% DR (5% per hime on a team of 6) and it basically moves your chance to get a Magna or Labros from about 35% to 65%. You might need to initially run a rainbow team (as you'll just stick six himes with DR accessories as opposed to getting it all from one element) and you'll suck for the raid. It's called leeching, but it'll speed up your farming by a lot. A lot of players do it.
Dejnov.
I'm getting back into this game after I stopped playing a few years ago. I was pretty casual (Rank 59), but I want to learn more about the game mechanics and stuff. My big problem right now is that there's tons of info, but it's scattered in a million places and a lot of it is 3+ years old.
I remember there was a toolbox and calculator, but my link for it looks out of date. What are some up-to-date resources on game mechanics and strats? Other than Epic Quests, are there catch-up mechanics I should be aware of?
While the game has changed, most of the things written 3 years ago are still valid. Epic Quests are certainly a good starting point, then it's just a matter of... grinding everything possible.
For a new (and new-ish) player, the most important thing is to draw the Gem Gacha daily and get those skill levels up.
To add on to what slashley said, under the "quests" tab there's now rotating (weekly) advent fights that allow you to get weapons/eidolons from advents you might have missed.
I've been dutifully grinding since my post last week, and working on building up a Dark weapon grid. My bottleneck right now is fodder for weapon skills. Any options for that aside from Gem Gacha?