There lies the difference of opinion . My experience tells me that Dektol will not work... you may be able to get somewhat basic results, but when I changed to the Metol only developer... BAMMM.. NOW WERE TALKIN.
Its kind of like lith printing... one can get basic results with lets say Kodak A B but always a bit weak... change to Champion AB and ...BAMMM.. NOW WERE TALKIN.
I strongly advise Tkamiya to read the paper by Mr Jolly and follow it to a tee... one of the most wonderful accurate descriptions on how to do this process I have seen.
I first started this path back in 2002 and 10 years later when I re read his paper its amazing how well he described what I have learned in the darkroom.