I do mall sarging pretty much so here are some of my tips.
1. When approaching at a store, after opening, do NOT chase the girl. So you opened, stacked a bit and then she leaves. DO NOT FOLLOW her, this will lower your value. I'm pretty sure the first few times you will want to re-initiate the chat by following her, but that actually creeps her out. It's also a sign that you haven't built enough attraction for her to stick around.
If she walks away and comes back later, see it as a IOI.
2. Go to target rich stores such as the make-up section of department stores (Macy, Nordstrom etc), and only women clothing stores (such as Forever 21). Day game is really slow compared to night game at clubs, you'll walk around a lot and visit the same store several times to pick your target.
3. Warm up by talking to random people at the food court, while ordering your drink/food. Then talk to some hired guns so you get in talkative states. Don't warm up on targets, since you want to conquer them

Warming up is very important to get you in that 'talkative state', do it by using hired guns. That's easy.
4. I hardly see girls shopping by themselves, so having a wing is always nice. Same goes for night game though, but when girls go shopping together having a wing helps a lot
5. Kino very light, don't do it too fast. In clubs kino-ing is pretty normal and can be done pretty fast, but in my experience in daygame it's different. Don't do it too fast, do it after some DHV-ing and after finding some commanalities. You can do high-fives and light touches on the shoulder. This all requires heavy calibration.
6. When entering a store, don't put that 'predator' look on you as if you are searching for targets. Walk in casually and alpha male and be occupied, then scan for targets. When your targets look you in the eye, approach immediatly (3s rule). Always have the same opener in your head for these cases, else you get a blank mind when you want to approach and then AA kicks in.
7. Watch for proximity alerts. When you're in a store and this girl keeps heading your way and keeps coming closer to you, then that's a proximity alert you have to anticipate on. Start openening immediatly. For example, I was at this only girl clothing store and occupied myself by looking through some dresses somewhere mid-store. Then this girls walks in, we look each other, and we continue our thing. She keeps coming closer to me, while I'm still looking for that dress for my wing's GF. Now she's at the same rack, 'just looking', but that's actually because she wants to be opened. Sometimes this might not seem obvious, but will be once you sarge more at stores
