Halo for a Powerlifting Meet

hi,
I’m 20 y/o, 255lbs(ish) 6’2 (1581@275lbs PB).
“natty” (took d-bol a couple of times PW for fun…)
and i have a meet in about 30 days, the prep is almost done.
a good friend of mine gave me something like 14pills of 10mg halo, leftover from one of his cycles…

would it be beneficial to use it for the meet day / couple of days leading to the meet / or maybe meet day + heaviest lifts in the prep ?
if so, what dosage ?

sorry for my english, its not my first language
thanks, dimitri.

Any1?

No…