Did LN Hox and Tempest Spine today. I decided to restrict the raid to max 8, so we did Hox with 8 people and Tempest Spine with 7. Result: a few lag blips, but nothing bad, nobody died due to lag, completed both raids in good time, had tons of fun.
I think it may be time to consider changing the max raid size (and possibly max party size) to 8 and 4 respectively. That alone might clear up the lag sufficiently to make the game fun and playable again. Until then, I HIGHLY recommend shortmanning. It REALLY made a HUGE difference.
Also I pulled the handwraps I wanted on 1st run of TS, which was delightful. I love Legendary TS, it's so much fun.