Before tackling this, this was the last achievement I had to get so I had all these skills. You at very least need the first skill "Combo" which I listed below.
First you need to purchase these three skills from the Chiming Tree:
"Combo" - Allows you to build a combo meter, which is purchased on the 2nd branch then it's the 2nd skill.
"Lets Roll" - Allows you to reroll the blessing on the altar, which is purchased on the 4th branch then 5th skill
"Starting Package" - Allows you to start with a combo of x2.0, which is purchased on the 6th branch then 1st skill.
Once you have gotten all these skills start the level and try to get to the altar as fast as possible without being hit. Once at the altar you should be at 2.5x unless you found it a lot quicker then that's great - keep rerolling until you find the blessing for 3.0x and now it's all about being careful not getting hit to finish the level off.
If you can't reroll anymore I just restarted the level and tried again.
Good Luck!