First, it must be understood that those detox tea potions (and cranberry pills) do nothing to rid the body of THC, despite what those sales pitches would like the consumer to believe. By consuming the potions with cranberry pills, all youre accomplishing is dilution - the same thing that you would accomplish using N2's Dilution method. And the effects of dilution (regardless of configuration) are only temporary - once the fluids ingested had all been urinated out, the bladder is replenished with fresh THCA-laden urine by the kidneys, and thus the donor is right back to square one.
There is nothing, and I repeat, nothing that can permanently rid the body of THC except for time and fat-burning exercise.

It also must be understood that dilution techniques (again, regardless of configuration) can backfire if the THCA concentration in the bladder is too high. For most longtime daily users, it would be virtually impossible to dilute that concentration enough without sending the S/G and creatinine levels into a downward spiral and sending up the red flags at the lab.

Sweating is hardly of any help because very little THCA is excreted via sweat. You can sweat enough to fill many buckets, yet the amount of THCA being excreted would still be miniscule. The rest are being excreted via the urine and bowels.

My first concern is in regards to the validity of newer, more up-to-date tests. The original thread was written 8 years ago, and I'm wondering if maxing my creatine while drinking heavy amounts of liquid is still viable, or if they can now test for such attempts.
Even after 8 years (as of this writing) nothing has changed. The acceptable limits for creatinine and S/G are still the same. The steps that are outlined in N2's Dilution sticky thread are still viable today (the only exception being the 'Aspirin' step, which has been addressed in the closing post of the sticky thread).

There are no upper limits established for creatinine. As long as the creatinine level is over 20 mg/dL, its satisfactory. However, this does not mean you should go overboard with creatine-loading. Doing so can result in long unwanted bathroom sessions, sitting on the toilet seat

When doing your creatine-loading, its advisable to check your efforts with a validity test kit. These kits will also check the S/G. They are inexpensive and can be found by doing a Google search for "drug adulteration test kits". Its also advisable to pick up some THC test kits as well.

How much creatine should you take would depend on what your "baseline" creatinine level was before you began your loading - and each persons baseline is different - and youre not going to know what your baseline creatinine level is without using the validity test kits.