nothing really. you said sides haven't been a problem before, right? That shouldn't change.
So the problem with Sustanon is that, of the 250mg of test, 100mg is test decanoate. As long as the test dcanoate is in your system (and it can take 3+ weeks after your cycle to clear), your PCT can't be employed effectively. At the same time, that's not a lot of testosterone. It's less than half the sustanon total mg's. So between your last pin and the clearance time, you're going to have to deal with relatively low testosterone. You're just putting off recovery, basically, without any added benefit. I believe that, overall, this is actually worse than an Epi only cycle. More isn't ALWAYS better. I'd rather run the epi for 5 weeks and start recovery right after the last day of the cycle, rather than run a 5 week cycle that includes a small amount of sust and have to wait an additional 3 weeks to start recovery.
Juggs's proposal is moderately better, but it's not perfect. Even that is going to put you at starting your pct a full week after your last epi dose, and you've only run 3 weeks of test during that time. That's not enough time to get any results out of it. I suppose it would potentially help counter any sexual dysfunction that might occur in an epi cycle, if that's something you're prone to, but it would also put you in a situation where you'll have to run an AI, something you probably don't need to do with Epi alone.