{Let me have joy of thee} (eg(9320)sou onaim(886e)). Second aorist
middle optative of onin(886d)i, old verb, only here in N.T.
Optative the regular construction for a wish about the future.
"May I get profit from thee in the Lord." {Refresh my heart in
Christ} (anapauson mou ta splagchna en Christ(9369)). See verse  7 
for anapauson (first aorist active imperative of anapau(935c)) and
splagchna (3 times in this letter,  7,12,20 ).