[Grammar] "Key to" + verb (infinitive or gerund)

[inase]

I understand "keys to writing heart-felt messages" or "Keys to heart-felt messages" are both correct. I am wondering if the "keys to" expression followed by an infinitive verb below is acceptable. Do native speakers say this?

Keys to write heart-felt messages

Thank you in advance.

 

[GoesStation]

If you will put these phrases into sentences, we can review them and try to answer your questions.

 

[inase]

If you will put these phrases into sentences, we can review them and try to answer your questions.

Please assume that it is a title or headline in an article. If I put it in a sentence:

Timely, recipient-centered, and sincere responses are all keys to write heart-felt messages.
Timely, recipient-centered, and sincere responses are all keys to writing heart-felt messages.
Timely, recipient-centered, and sincere responses are all keys to heart-felt messages.

 

[Rover_KE]

Stick to #2 (if you had numbered them).