SE support on this is a joke. I've been having this issue since roughly 6.38 as well and its murdering any possibility of ultimate prog because the game becomes a slide show in the middle of our raid times.
I have two internet lines (separate ISP's) and generally could get around latency issues by switching to the other outbound connection, but now the issue is inside NTT's network and SE claims they can't do anything about it and I need my ISP to fix the routes.

If the whois data isn't lying (and it rarely is for tier providers) NTT owns the server IP's all the way back to that dallas hop. Neither of my ISP's have control over this. Nor this

Even tooling output wasn't enough to sway them that its an NTT issue:
Code:
|---------------------------------------------------------------------------------------------|
| WinMTR statistics |
| Host - % | Sent | Recv | Best | Avrg | Wrst | Last |
|-------------------------------------------------|-------|-------|------|------|------|------|
| leaving my network - 0 | 11513 | 11513 | 0 | 0 | 7 | 0 |
| ISP network - 0 | 11513 | 11513 | 0 | 0 | 29 | 1 |
| ISP network - 0 | 11513 | 11513 | 2 | 2 | 7 | 2 |
| Leaving ISP network - 0 | 11513 | 11513 | 7 | 11 | 31 | 13 |
| ae-5.a00.dllstx14.us.bb.gin.ntt.net - 1 | 11509 | 11508 | 7 | 33 | 95 | 26 |
| ae-2.r20.dllstx14.us.bb.gin.ntt.net - 29 | 5427 | 3885 | 0 | 33 | 81 | 18 |
| ae-2.r24.lsanca07.us.bb.gin.ntt.net - 5 | 9712 | 9242 | 31 | 52 | 1906 | 37 | <- according to SE, this is my ISP's issue
| ae-5.a01.scrmca03.us.bb.gin.ntt.net - 1 | 11388 | 11355 | 41 | 62 | 168 | 41 | <- these as well
| ae-1.a00.scrmca03.us.bb.gin.ntt.net - 1 | 11402 | 11373 | 41 | 60 | 170 | 41 | <-|
|xe-0-0-5-0.a00.scrmca03.us.ce.gin.ntt.net - 1 | 11419 | 11394 | 41 | 57 | 100 | 41 | <-|
| 204.2.29.241 - 79 | 2794 | 593 | 0 | 57 | 97 | 41 | <-|
| 204.2.29.86 - 1 | 11422 | 11398 | 41 | 56 | 94 | 42 |
|_________________________________________________|_______|_______|______|______|______|______|
No sir, that is clearly my ISP, and not just one of my ISP's, BOTH of them.