Mudra why so many ninja don't use them?

[Gemina]

Because they simply don't know how to. I'm a horrible ninja but even ik that unless your maintaining suiton u allways wanna use raitons

Raiton is actually your filler. Consideration can be given to Fuma if finishing off an enemy before a double mudra can be performed, or the boss is going to enter a transition that will expire Raiju Ready such as Barbariccia or Proto Carbuncle's.

All other jutsu are entirely situational and there are several.

For AoE situations Katon is your go-to. Doton requires at least five ticks to beat out Katon, so if at least one enemy will survive that long, then Doton should be applied and should be your first jutsu cast unless TCJ has it covered.

Suiton is for 2min and 1min burst windows, and Hyoton is only used under Kassatsu, which also falls under the burst windows.

I tried to explain this to a friend of mine and his response was, "I'm just going to play Ninja Storm."

I also suggested that Huton should come with a small AoE nuke instead of having the ultra lame Hurajin. Oh well. :/

Edit: Man, my Doton math was way off. I'm surprised no one called out my BS, lol. Ah, well. I fixed it.