Surely the OP just wants to log what he’s done through his session.
But unless you know the power then the number of times you rotated the wheels doesn’t tell you anything about what you have done. (30,000 revs in 53/11 resiatnce 1 will be easier than 3,000 revs of 53/11 in resistance 10). It would be like telling people you rode 10 miles in 15 mins but neglegting to tell them it was all downhill.
But if you could record wheel revolutions, resistance setting and gear inches then you could find out where you are on the power curve and calculate power. Then you would know how many watts you were putting out, how much energy you had used etc.
Candence is kind of useful as you can get used to pedalling at an efficent rate.
Heart rate is also useful as you can understand how hard you are training.