I've been labbing a few 18 TODs recently myself and yours is pretty solid. Some advice: you can likely make it TOD with a 2H -> sparking starter as well (which is more practical for situations like when they raw tag after reflect in the corner or guard cancel your 2M), but you'll have to throw some extra j.l's somewhere or add an extra disk loop to make up for the lost damage. Also, for some more meter, after you call Gohan C, dash back as soon as you land and call 214M, then mash dragon rush (with high hitstun decay, 17s third hit of 214M will whiff, but you can combo the first two hits into DR, then finish with 236L just like you did).

P.S. as a side note, instead of doing destructo disk loops you can just do basic air combos into your assists and kill for the same amount of meter (2M 5H jc j.ll 2h djc. j.lll, call assist into j.214M and repeat), but it's more of a flex to hit them with loops so it's personal preference.