In case someone finds this useful I tried to calculate what I should set the aging slider on to achieve the same result as the "better aging" option did in realtime.

Disclaimer. 1) I may be completely wrong. I welcome anyone who has a better answer to post it! 2) From the description in the realtime mod I could calculate the factor by which time is slowed when speed is set to 6 and 1, I had to make an estimate for speeds 2 to 5. When I constantly divided by two it was nearly perfect so I stuck to that.


When using the realtime mod to achieve 1 day = 1 cimyear this is what the slider of lifecycle rebalanced needs to be set on:
realtime speed 6 = slider 10
realtime speed 5 = 20 (est)
realtime speed 4 = 40 (est)
3 = 80 (est)
2 = 160 (est)
1 = 340

If nightspeed is different from dayspeed the value should lie between the two outcomes.
calculate as follows;
hours of nighttime * slidervalue for nighttime + hours of daytime * slidervalue for daytime.
Divide sum of this by 24. Result is your slidervalue.

Example: nighttime from 22:30 until 6:00.
Hours of nighttime: 7 and half. Hours of daytime: 16 and half.
Nighttime is set to speed 6 (slider 10) and daytime is set to speed 4 (slider 40).

7.5 * 10 + 16.5 * 40 = 735.
735 / 24 = 30.6 so set slider to 30 or 31.


gameplay time
If I calculated correctly, when the slider = 1 (vanilla gameplay), 80 cimyears (a full life) take 5 and a half real hours (when speed ingame is set to 1, normal). With the mods default value of 3 thats 16 and a half hours. Realtime values are way higher. Now that I've done the calculations I will probably stick with the default value of 3.