so i am on week 2 of test cyp200/ tren e 200 (10 week cycle) just one shot a week.

i am leaving for school in a month and would like to order ahead of time to extend my cyle.

heres what i was thinking

weeks 1-10 test cyp/ tren e
weeks 11-15?? test prop 100mg eodpct weeks 16-20 hcg, nolva, and arimidex

cyle historty 2 cycles 1) test e 500mg 10 weeks 2) test e/ deca 12 weeks

stats 6 feet 205 pounds 13-15% body fat

QUESTION: do u think its a good idea to extend my cycle with some test prop? if so, how long should i run it...i was thinking 4-5 weeks? anything else i could do to promote lbm and keep most gains from test/tren?
thanks guys