I think it is widely agreed that the current armatar values are fine... And just stay active, then you'll soon reach the next ones.
If they were all available faster we'd definitely be getting more 'WE WANT MOAR ARMATARS NAO' threads, and we don't want that. Learn a little patience, enjoy the site, and enjoy the armatars when you get to them, without stressing over the AP you need to unlock them.