I think its a good choice, Id just buy epi and extreme tren or dienedrone and make my own, spawn is a ripoff. But ya it will give you dry gains cause of the epi, but the tren is more water bulk when ran alone in my opinion. most will disagree but I bloat 2-3 days after I start, then deflate when I stop.
If I were you Id just pick one, run it 6 weeks, pct+time off then run the other one, at least then you will no what is doing what, where the sides come from and what you like better.
Just my.02, good luck either way.