Unfortunately, you landed yourself with some of the more pain-in-the-butt materials to farm for, since their good nodes come late-game and also are still rare. Events usually hand them out in fair amounts, at least enough to cover your ascensions most of the time buuuuut that's one downside to this game is that you can end up in quite a pickle like this.
Sadly while skill levels are safe to ignore short-term, ascensions tend to bottleneck new players into farming if luck of the draw decides they need something not generously handed out. It's a shame, probably one of my only real complaints because so many other things are handled fairly well. But, sometimes you get the short end of the stick...
Well, event quests sometimes have far better drop rates for most materials at least, but they're limited time only.
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Edit: Although, piggybacking off of a strong Cu Alter or Heracles allows new players to circumvent most of this problem with their ability to solo most of the game up until some Epic of Remnant stuff, which lets you reach the places you need to be to farm what you need, but, that's kind of a bandaid for a bigger underlying issue and understandably some people feel it's too cheesy or lame to go that route.