01:04:973 (64973|2,65190|2,65408|2,65625|2) - I'd recommend moving this to another column to prevent an anchor with 01:04:538 (64538|2,64756|2) - these.
01:38:669 (98669|1,98886|1,99103|1,99321|1,99538|1,99756|1) - That's a pretty long anchor.
01:45:625 (105625|1,105843|1,106060|1,106277|1,106495|1,106712|1) - This one too.
01:49:756 (109756|1,109973|1,110190|1,110408|1,110625|1) - And this one, though it's mostly because of that double stair right after.
01:57:908 (117908|4,118125|4,118343|4,118560|4,118777|4) - I personally prefer putting less than 4 notes on the same column in succession but I guess your mapping style is a bit more lenient about it?
02:00:951 (120951|2,121169|2,121386|2,121603|2,121821|2,122038|2,122256|2) - I can see that this section is dense but I think this is avoidable. Suggestion below.
04:06:712 (246712|3,246930|3,247147|3,247364|3,247582|3) - Whew another anchor.
04:10:843 (250843|2,251060|2,251277|2,251495|2,251712|2) - There are these as well.
04:11:386 (251386|3,251603|3,251821|3,252038|3,252256|3) - ^
04:15:299 - ~ 04:16:169 - What happened to the 1/4 background synths?
04:25:951 (265951|2,266169|2,266386|2,266603|2,266821|2) - Could've been avoided.
04:26:495 (266495|3,266712|3,266930|3,267147|3,267364|3,267582|3,267799|3) - This guy too.
04:31:930 (271930|3,272147|3,272364|3,272582|3,272799|3,273016|3) - This is going to wreck my spacebar.
04:33:777 (273777|4,273995|4,274212|4,274430|4,274647|4) - & 04:34:321 (274321|3,274538|3,274756|3,274973|3,275190|3,275408|3) - Kinda dense around here so it may be hard to remove these anchors. Suggestion below
04:37:256 (277256|2,277473|2,277690|2,277908|2,278125|2) - This anchor can also be fixed.
04:38:886 (278886|2,279103|2,279321|2,279538|2,279756|2,279973|2) - A long anchor like this right after a long anchor on the same lane might be too harsh on the players.
04:40:516 (280516|3,280734|3,280951|3,281169|3,281386|3,281603|3) - R.I.P. my spacebar.
04:41:277 (281277|2,281495|2,281712|2,281930|2,282147|2,282364|2) - Alot of the anchors in this section seems to be on column 2.
04:44:212 (284212|1,284430|1,284647|1,284864|1,285082|1,285299|1) - Well there's one on column 1.
04:45:408 (285408|3,285625|3,285843|3,286060|3,286277|3,286495|3,286712|3,286930|3) - Now this one is really long. Suggestion below.
04:47:473 (287473|4,287690|4,287908|4,288125|4,288343|4,288560|4) - Not as long as the previous one.
04:48:234 (288234|3,288451|3,288669|3,288886|3,289103|3,289321|3) - Same length as the previous one but this one looks trickier to remove. Suggestion below.
or
04:50:190 (290190|5,290408|5,290625|5,290843|5,291060|5) - Another anchor.
04:51:169 (291169|2,291386|2,291603|2,291821|2,292038|2,292256|2,292473|2) - This is a pretty long anchor. I suggest moving some notes to column 1 since it looks pretty empty.
04:52:799 (292799|2,293016|2,293234|2,293451|2,293669|2,293886|2) - Wew. Move 04:53:451 (293451|2) - to 0 to prevent this?
04:54:430 (294430|3,294647|3,294864|3,295082|3,295299|3,295516|3) - Oooh this looks hard to manage. You can try moving 04:54:864 (294864|3) - to 0
04:55:190 (295190|2,295408|2,295625|2,295843|2,296060|2,296277|2) - And there's this one right after. Moving 04:55:843 (295843|2) - to 5 might work.
04:56:060 (296060|4,296277|4,296495|4,296712|4,296930|4,297147|4,297364|4,297582|4,297799|4) - & 04:56:277 (296277|1,296495|1,296712|1,296930|1,297147|1,297364|1) -
Suggestion below but I'm not sure if this will be easy to read.
I also noticed that you intentionally made a pillar on column 6 from 04:52:690 - to 04:57:908 - but I suggest that you switch its lane somewhere in the middle as it might put too much strain on the player's right ring finger which isn't so strong (or right pinkie finger if that player isn't a space user which is even weaker than a ring finger)
04:58:125 (298125|1,298343|1,298560|1,298777|1,298995|1,299212|1,299430|1,299647|1) - The last anchor left to point out in the map. I'd like to point out that this section bullies the left hand alot so maybe you can move some notes to the right hand side.