I completed act 6 couple of months back and explored act 7.1 last month an still 10% away from my 1st t5cc. My suggestion is patience if you don't want to complete abyss. Although there are many contents which allow you to reach the milestone like variant exploration, but I hate when rng hits me back. So I am waiting for this month's quests hoping for t5cc rewards.
Comments
Complete/explore act 6.
Monthly cavalier eq & side quest.
7.1
Map7 mods milestones give t5c crysyals