i got 30Ekeys and the chances between p69 and p135 cannot be compared, why go for 135 and not 69 i dont get it

I have great news! You can compare the chances between puzzle 69 and puzzle 135. You will discover that 135 is actually easier to solve than 69, by an edge of around 50% (when factoring in the GK/s processing advantage).
i use privatekeys.pw calculator for puzzle 135 with 30Ekeys i get 13802108831432.087 years , for puzzle 69 with 400Mkeys i get 46763.364 years (same server)
Just as you can discover the pvkey in the millions or billions of years that the calculator estimates, you can find the private key in the first five minutes, five hours, or five months. Depends where you're looking for.