if you have to shoot someones face...at all....
no lavs...
there is no special way to make lavs smooth without them being consistently in the same place.

take the shotgun and make sure you do standing dialogue after each scene is done.
it will be a lot easier later to sync up the mouths in editing if you have to.
the shotgun will also get your room/background noise a lot easier that a lav.
i dont know how much work your putting into the film editing wise.....

lavs cant get wet....so blood and sweat fucks everything up..
lavs move around a lot.....against clothing makes it sound like someone opening a bag of chips but never gets them open.
lavs take batteries.....fuck that...
lavs makes some voices worse.....high to low...high pitched voices...super bass sounding voices...its tricky
sometimes cords and transmitters fuck things up.....because for fucks sake they only make lavs with the shittiest copper wiring..
horror movies usually have a lot of screaming....that would be peak static if you used lavs...

if you dont have someone monitoring the sound board for the lavs, literally anything can happen...

go with the shotgun.

room noise....foot steps and shit..wind..
sounds from far away....depth you cant get with lavs...screams in the distance...

separate dialogue is easier
do the scene..
have people read there lines after its over
after because they have a better sense of whats actually happening in the scene
sometimes we do the sound and the actor only says there parts in the conversation. both actors are performing but one of the actors just mimes the words without any voice...for timing with the voice actor..
then you have a voice file of one person.
and a voice file for the other person.
edit back in post...

regular standing dialogue.
no movement..
no props
about 2/3 feet from shotgun...



invest in a dope muffle if its windy
get a boom stick...
have a friend run the audio while you direct...

maybe see if your school has a phantom powered tascam with 1/2in or xlr pins to plug your shot gun directly too it...


PA
one for director
one for audio.

WRITE THAT SHIT DOWN SO YOU DONT HAVE TO GO OVER FILE NAMES AND NUMBERS LATER..