According to Mojsin (2016), “In phrasal verbs, the stress is on the last word” (p. 93) regarding two-word phrasal verbs.
One example she gives is “He picked up the box,” which she writes as "He picked up the box” (she doesn't treat the status of "box" here, but consistent with her rules it would be "He picked up the box”).
No, that is not correct. It seems that Mojsin (whoever she is) has misunderstood the stress patterns of phrasal verbs. Although it is true (and a notably interesting feature of phrasal verbs) that the particle is stressed, this only applies noticeably when the particle is the final word of an utterance.
Look, if you say only
pick up, it sounds like this:
pick up
and if you utter a phrase like this, with the particle in the final position, it sounds like this:
Do you want me to pick you up?
You can hear here that the stem verb
pick and the particle have more or less similar stress.
But when the particle is followed by other words (especially verb objects), this is no longer the case:
I picked up the box.
(Note: I'm not claiming that the particle could not be stressed in the sentence above because one could pronounce it like that. However, that would not be the most neutral way.)
She then compares phrasal verbs with "noun forms of phrasal verbs" (p. 94):
A.
Phrasal Verbs (stress on the second word)
The car was tuned up.
B. Nouns (stress on the first word)
My car needed a tune up.
Yes, that's right but possibly not for the reasons she gives. As I explained above, the particle is stressed in the first sentence above because it is in the final position (which intransitive phrasal verbs often are).
Based on Mojsin's rules, one would say "I tuned up my car."
Then don't follow her rules. Who is she anyway? Obviously not a phonologist.
Are you really a native speaker, rompercabeza? If so, just listen to the way you yourself say these phrases. If not, please change your profile information.