There’s a bug with the Moni rune (using a mobility skill) not working properly with Tec rune (creating Earthquakes) if you have over 50% attack speed.
I thought there was an internal cooldown on it but after testing I found out that when I have attack speed lower than 50%, I am able to create earthquakes (tec rune) with my lunging strikes (moni rune) every 2 attacks. But if my attack speed is over 50%, it bugs out and my lunging strikes procs earthquakes every 4-5 attacks.