Eh, I'd prefer:

Ten: Fuma Shuriken
Chi: Raiton
Jin: Katon
X> Ten: Huton
X> Chi: Doton
X> Jin: Suiton

This way, TCJ can still go T>C>J for Fuma>Raiton>Suiton if it takes the first two as singles and the last two presses as a double.
Or T>J>C for Fuma>Katon>Doton for AoE.

It also means that when unlocking mudra's, you still only learn Fuma at first, then gain access to Raiton second, plus Doton instead of Katon, so you stil have an AoE option.
Or you could swap Katon and Doton around, so that you still learn the ninjutsu in the right order, and your AoE TCJ is now Fuma>Doton>Katon