Tl;DR No longer is it going to take an exponential amount of hits to get to 5x multiplier and higher. It is going to take a, "set amount between tiers."
Using Relentless Combination can expedite this process
EDIT: For everyone who does not understand the Crit on Slide Attack stat, it adds additive base critical chance to your slide attacks
You gain 100% additive critical chance on your weapon with a base critical c