Ok, hope this helps. The zip file has three saves from my portals 33, 34 and 71. I think 33 or 34 might be where 125 was easy reachable, but there are 1 or 2 Imports missing - 71 has them all.
Let me know if you need higher or lower ones.
I personally just level Overclocker whenever I have magmite left over at the end of a run and can afford a level of it (Currently at 120 levels). You are correct that Overclocker will approach but never reach 100, and that it has diminishing returns. Running the numbers it looks like the returns really start diminishing around 150 levels, but anything up to about level 300 will still have at least 0.01% return (but by then you'd be at 97.5% efficiency, I think that's plenty). Here is my math if you want to look at it: https://www.desmos.com/calculator/cyfvw6vrim
Your submission appears to have been automatically removed by reddit. While I don't know why https://hastebin.com/ is banned, regardless I would prefer if you could use https://pastebin.com/ for sharing save files. Thank you!
I actually didn't make any of the icons in the game! I used free icon packs from Icomoon and the free glyphicons included with boostrap. It's a bit rough since they're designed for websites, not games, however I'm quite limited as I can't use any paid icon packs since I use github, which allows people to download the game files, which causes licensing problems.
Also, the staff is an icon of a leaf :) My icon skills show more in the form of figuring out which icons could technically pass as things they're not, haha.