I’m not sure about a perfect method for learning a language. I suppose everyone learns differently, and at a different pace. I’m in season 7, and it seems to be working well for me.

I could imagine that Anki would get tiresome; this isn’t the first time I’ve tried Japanese, or even the first time I’ve tried Textfugu. Last time for me, I got really hung up on the vocab; I burned out, got behind, and gave up.

At the moment, in addition to Textfugu and Anki, I am listening to Japanese stories online for listening comprehension, and I write at least five sentences a day to try and reinforce the vocab. It’s not perfect, and there are still some words that hang me up, but I think I’m doing better this time around.

Can’t say much about the end of Textfugu yet, though. I’m not sure about it getting boring, but you might have a point, I haven’t really paid much attention to that, possibly because I’ve been trying to go kind of slow in order to absorb the material better.

I’m not sure I’d look in only one place for everything, maybe one source will do one thing really well, and another will be able to make up for the first one’s weaknesses, something like that.
I think persistence is the most important thing, though, so don’t give up whatever you do!

Hope that helps.