If I scale in before a trigger I usually do it by selling 15 - 20 delta puts...which I've done in both these names...and have still been getting my butt handed to me. The nice thing about your approach is defined risk, but the market makers are pretty smart and price the vol into the reversal scenario....so you may find that you're not making what you expect on the way up (FWIW, strangely I'm also short the calls you're long in order to partially hedge my naked short puts...but I'm short the JAN expiry. Be careful out there - these names still have very high multiples and high multiple names have been in the crosshairs lately.  
*I'm strongly considering adjusting my trading plan to only go with spreads on high multiple names from now on. So, instead of being naked on both sides as I just described, I am leaning more towards selling iron condors (adding a long wing under and over each short option...ofen wider on the side I think is less likely to get hit based mostly but not 100% on technical analysis).