IMO tramadol is worthless if your on methadone, especially if you're on a dose as high as 130mg. Tramadol's opioid activity is just barely stronger than codeine. I doubt that you would feel any effect or reliefe from using it. Perhaps you may get a slight stimulation from it's SNRI properties though I doubt it. Also, the maximum dosage of tramadol that is safe to take is somewhere around 400mg, though this can be effected of you are on other medications (especially antidepressants). Dosing too high can cause seizures and seretonin syndrome.
Totally not worth it in my oppinion my friend. It's time to face the facts, your opiate receptors are saturated and there ain't no way in hell that tramadol is going to potentiate your meth in any noticeable way.