Hi ivtrainer. Welcomes on stroidology.
178 lbs for 5'8 is not realy heavy. 14% BF.
get 10 more pounds natural, as well at 14BF.
going on gear to get... what... 15 pounds and then arriv to 193lbs is not a serious goal. is just my opinion.
Answer to this question please : in 5 years, how mush did you gain?