Refusing breast lift and choosing implants only. Deflated 36C.

Thank you for the interesting question.  I would suggest that you be very careful with your decision-making: undergoing breast augmentation surgery only, when breast lifting is also indicated, can be a "recipe" for an unsatisfactory cosmetic outcome,  disappointment, and potentially require additional surgery to "correct".  Also, generally speaking, I do not think that it is a good idea for patients to undergo breast augmentation surgery, with larger breast implants than they would otherwise select, in order to avoid the need for breast lifting.In my practice, if (based on significant clinical experience) I  feel that a patient will not end up with aesthetically pleasing operation with breast augmentation surgery only, I would not do the operation for her.  In this type of situation, patients are better off avoiding surgery altogether. Having said the above, there are cases where patients present with "borderline" breasts ( when it comes to  breast lifting indications);  often times, breast augmentation surgery alone is a viable option. My best advice: select your plastic surgeon carefully.  Do not select your plastic surgeon based on the fact that he/she will offer you an operation (regardless of the unsatisfactory aesthetic outcome that will inevitably result). You may wish to post photographs (frontal and side views with your arms by your side)  for more specific thoughts. Best wishes.

Far more important than the technique is the skill and experience of your plastic surgeon. Choose your surgeon rather than the technique and let them explain why one technique may be better than another.  See the below link on some suggestions on finding the most qualified Plastic Surgeon for a Breast Augmentation Always insist on a board certified plastic surgeon.

A breast augmentation is often performed in patients looking to replace volume lost from weight loss, breast-feeding, or age or to increase the size of the breast for aesthetic reasons. The ideal candidate for an augmentation alone is a woman with good skin quality who lacks breast volume but whose breasts do not sag and whose nipples are otherwise in good position.
The decision to do an augmentation by itself versus an augmentation with a lift is less based on patient preference and more dictated by the nipple position and the ratio between the post-augmented breast volume and the amount of excess skin you have. The less volume, the lower the nipples, and the more excess skin you have the greater the chance you will need a lift and the more of a lift you will need.
That being said, with grade 2 ptosis, it may be reasonable to have an augmentation alone with the understanding that a secondary lift may ultimately be needed to achieve your goals. 
See the link below for more info.
A detailed examination will help delineate the best surgical option. In office sizing and digital three-dimensional computer simulations can help guide your implant choices. Consultation with a surgeon certified by the American Board of Plastic Surgery would be the next best step.