For me the Tuss is definetly one of the best RDJ acid has to offer. I listened to it first as rushup edge album and it blew my mind completely, especially that it was made by some British couple and a kid))) the more I ve listened to it more I doubt that it was actually the case. After a friend of mine and my flat mate got himself the confederation though vinyl and I ve listened to fredugolon 6, I completly felt in love. Still up to this day even after syro and collapse ep, I believe that fredugolon 6 and synthacon 9 are the one of the best acid tracks sound wise. Complexity wise not really, a lot of acid tracks from druqks were more complex than those two, like omgyiya switch, vordhosbn, cock/ver, meltphace. Or some tracks from syro b side, like earth portal mix, or psylumincence mix... they have much more complex structure and a lot more stuff going on, but still those fredugolon and synthacon tracks they have a special place in my heart.
P.s. beautiful Japanese people has warm nostalgic effect on me, similar to the one I get from listening to some warm Boards of Canada tracks.