Wow, thanks heaps man, not only is this a mod to my map, this is like a whole lesson on mapping. I'll be honest, I had nearly no knowledge about mapping before I started this map, I didn't know what shit like blanket meant, or kd etc. etc. I've been learning the whole way. This more than doubled my progress. Good stuff! I'm basically gonna half remap a lot of it from here I think, now that I know a lot more about mapping structure, stacks, and flow and shit, very grateful for this mod.
You've compiled maps that are known for their AR8 difficulties, and marathons generally tone the AR down even further, but you've made it much higher, both throwing off people who know the AR8 difficulties and making the marathon harder than it should be. I highly suggest at least changing to AR8.2.
I'll turn AR down to 8.5, I don't think that will make the earlier 2 songs too hard, but I'd say around 8.5 is the bare minimum for Best FriendS at least, although 8.8 would be more comfortable for it, I guess this will balance it out for the first 2 songs.AR increased back to 8.8, at popular demand by high ranking DT players, and by my judgement. 8.5 is too slow for Best FriendS, people thrown off by the high AR can get used to it easily (Provided they can read high AR), while not everyone can just read density as well as MillhioreF. 8.8 isn't even that fast for the 2 earlier maps anyway, my map has more density than the original AR8 maps due to patterns and stacks imo.
Your flow is very off in almost I would say the majority of the map. I'd suggest a remap but since the song is so long perhaps only map sections with bad flow. You can find out if it's bad flow simply by following the beatmap in edit mode with your cursor, and when something feels off, fix it.
Most of the map is very unclean, as in, overlaps and missed stacking opportunities, ontop of lack of shapes for the most part, results in having this 'unclean' feel. I suggest you go over your map and fix overlaps, and generally try to stack more, and try to make some simple shapes, e.g a square, or triangle. These are simple and easy to make with almost any combination of sliders and hitcircles, and really should be utilized you improve your map's overall quality, and overall, clean it up.
Remapping most of song
00:00:265 (1,2) - Make these the same slider.
00:01:122 (3) - Avoid overlap here.
00:01:336 (4) - Stack on the sliderend of 00:01:336 (4,1).
00:02:836 (3) - Try Ctrl+G, ctrl+left arrow, then stack on the start of 00:01:979 (1). If you don't want to do this, at least fix overlap here.
Now for a pattern change. Move 00:03:479 (5) - to X=336 Y=256. Make 00:03:693 (6) - look like this. Then copy 00:03:693 (6) - in place of 00:04:122 (7), ctrl+right arrow twice, then stack on 00:03:479 (5) - then stack 00:04:550 (8) - on the sliderend of 00:03:693 (6).
00:05:407 (1,2) - Here your flow is not very good, you have the cursor moving fast from (1) to (2), as it is a 1.5x distance snap jump, larger than the usual spacing, making it so the cursor gains speed, only to stop in it's tracks upon reaching (2) and forced to move upwards in a very uncomfortable way.
00:30:693 (4) - Not a very nice looking slider shape at all. I suggest using something more like this.
00:42:907 (5,3,7) - Stack these together. It makes no sense with your previous patterns to not have these stacked.
Another flow/pattern fix.
01:06:265 (3,4) - Ctrl+G.
01:06:693 (5) - Ctrl+G.
01:07:122 (1,2) - Ctrl+G.
I just went through a portion of the Koigokoro section here, if you have any questions or need advice don't hesitate to send me a message either in-game or on the forums.
Generally I would say the map isn't bad, but not good either. You have a lot more work before this becomes ranked, but you will eventually. I'm sure of it. Good luck with the map, and have fun!