For those who are wondering how much energy they have to spend for the first ascension (v1.015), here a little orientation:
energy spent / ascension cost / total energy needed
0 / 5000000 / 5000000
100000 / 1250000 / 1350000
200000 / 312500 / 512500
300000 / 78125 / 378125
400000 / 19532 / 419532
500000 / 4883 / 504883
The optimum is at 305750 / 72140 / 377890
With 5 nexus and several lepidoptera you should be able to get your first ascension within 4.5 to 5 days
The energy cost for ascending is halfed with every 50,000 energy spent. The minimal energy cost for the first ascension is approx. 377,890 energy (305,750 spent / 72140 safed), according to 5 M base ascension cost.
Thanks for the suggestion!