Same strat here, except you enter challenge 8, and you only go up to 5 dimension boosts. Then you go by this strat. first of all, sacrifice as fast as possible afterr unlocking 8th dimensions, then start counting. Then restart you counting as soon as the sacrifice multiplier starts going up again. You count up to the same amount as the first count, then sacfrifice and repeat the counting steps. Continue until you've gotten to infinty.

Upgrade order: 1,1 1,2 2,2 3,2 4,2

After 4,2 (Galaxies are twice as effective), You start doing normal runs again. Buy every dimension boost you can until you reach the first galaxy, then buy like 6 or 7. (Decreases the more infinities you do, and eventually it will stop at 5 or even 4 o be the optimal dimboost count)after you've done this, simply wait until infinty, that's your strat for normal runs.

Proceed then by buying every upgrade as soon as you can in this order: 2,1 3,1 4,1 1,3 2,3

After you've bought 2,3 (multiply first dimensions based on IP), you should buy upgrades like this: 3,3 at 17 IP 3,4 at 20 IP

Then after this, it's time for challenges!