Well, other than gaining 10-15lbs what else do you want from this next cycle? You could gain 10-15lbs with almost any cycle (though I don't know your stats/exp.)
Seems like you want to run Sus250 as your base, when using that mixed ester test, one could easily switch to Prop or Enan as their base depending on their goals/desires.
Sus250 and Deca would be a great bulker, plan on losing some of the weight right away as much of the weight will be water no matter how you plan it. I'd also just switch to an more enjoyable Test E with the long ester Deca as the Sus is not going to offer any particular benefit here.
You mentioned running Sus250 and EQ for your 3rd and it was also your first, so you must of liked it. Maybe consider adding an oral to this particular cycle or even better would be to add some Masteron Enanthate as a 3rd compound. I personally don't think that the EQ had much to do mith your enjoyment of the cycle as in my opinion it is pretty much worthless for bodybuilders. In other words adding an extra 100mg sus probably would have netted the same results.
Sus250 and Winni: I don't really consider an oral as part of the main cycle with long-ester cycles. If you ran Prop and Winni for 6 weeks than it would be, but more than likely you'd be running Winny for 6 weeks somewhere during an 12+ week Sus cycle, so I consider it more of an additive for certain needs. This cycle would basically be considered a Sus cycle with a Winny kick-start, bump or finish.
I am personally a big fan of Masteron for cycles, though it's more of an ancillary. I would consider running Test Enan (600mg/week) and Mast Enan (400mg/week) for your cycle. Consider this similar, but better than an Test/EQ cycle. The Mast will be similar to running Proviron, but with more of an performance enhancement as far as training goes, well plus the bedroom. It in itself won't offer much more in gains, but as much as EQ IMO, but with noticable positive effects on muscle hardness, positive aggression, mild strength, and overall drive. I'm usually thinking about performance as well as muscle gains and therefore than dictate my decisions a bit. You could add Tren E if you weren't concerned about a more than likely reduction in performance, but it would net a great increase in your overall cycle as far as physique changes. But then again, you might want to consider changing to short esters, in which I would run Prop/Mast/Anav or swop the Anavar for Tren Ace if performance isn't as big an issue as muscle gain and physique are.