The test dose you could stretch out pretty long safely, like 20 weeks even. As for the tren, bro I ran tren-A 14 weeks and got shut down HARD. I couldn't get it up without Cialis after week 12 and I am one horny dude. I've heard you can run tren-E longer than tren-A safely for some reason though. I think the sides are supposed to be less with the longer ester. Haven't tried it yet though.
I still would probably never run tren longer than 10 weeks though. Around week 10 things start to go downhill libido wise, at least for me. You really have to watch the prolactin gyno with tren as well. It flairs mine up every time but it always goes away post cycle or with a little letro.