This achievement is pretty easy till the very last level on journey mode. (Took me about 15 attempts)
The level was mix up in speed starting at medium pace, dropping to slower pace then getting extremely quick in the last 3rd.
A tip is to just complete lines as low as possible don't worry about stacking a few lines to hit in one go. Especially as the last part is very quick and you want to literally have every bit of space possible to form quick and easy lines. You can afford a couple mistakes on the super fast section if you've been good with completing lines till that point.