Doing "Can't Perfect Perfection" & "Running up the High score" any tips?

[Auditore]

I started a new play through on Extra Life mode and will be doing the achievements "Can't Perfect Perfection" where I only obtain 1 crystal perk and 1 praetor suit perk while also doing "Running up the High score" which requires me to have 10 extra lives when I beat the game. I am playing on I'm too young to die difficulty since I have already beaten the campaign on Ultra-Violence and have collected all collectibles as well as acquired all weapon mastery which my main goal is to rush straight to the end of the level without dying. However, someone had told me that if I pick up a sentinel crystal or complete a challenge and receive a Praetor point without spending either the crystal or point I automatically fail the achievement. I wanted to know if this was true because the milestone says only acquire one crystal and one praetor perk which I already did through the story.

any tips or help is greatly appreciated!