The weak form pronunciation of "for her" could be... /fɚː/?

[N Senbei]

Hello,

I have a question about weak form pronunciation of "for her" in American English.
Is it perfectly OK to pronounce "for her" as /fɚɚ/?
This sounds to me just like /fɚː/ except for inserting a glottal stop between "for" and "her" like [fɚʔɚ].
Or is it more natural to pronounce "for her" with a /h/ sound like /fɚhɚ/ than /fɚɚ/?

Thank you for your comment in advance.

 

[Tdol]

If you want to drop the /h/, then adding /r/ makes more sense to me.

 

[N Senbei]

If you want to drop the /h/, then adding /r/ makes more sense to me.

Thank you, Tdol! I really appreciate your comment, but I'm a little confused.
I believe adding /r/ perfectly works in non-rhotic accents like Received Pronunciation; yes, "for her" should be pronounced as /fərə/ but not as /fəə/.
But in rhotic accent like General American, "r" in "for" is already pronounced with r-colored vowel /ɚ/ which, I think, is basically the same as consonant /r/ except that /ɚ/ is syllabic and /r/ is not, so adding extra /r/ seems a bit strange to me.