How is her response to you right now while you’re on Emperor and Stark? If she’s responding well then I would stick with that stack and might tweak it just a little by adding something like Love Bomb.
You say that you want to be able to talk to her properly. Are you talking about picking her up, asking her out on a date? Sex and Seduction will help you with that.
If you include Heartsong into your stack then you have to be prepared that HS will work with you, but you’re not guaranteed to get this girl through HS. If she’s not good for you in the long term then one of you or both of you will drift further apart. HS is a great sub, but you should be prepared for that outcome before running it.
Just wanted to add that if you’re happy with Stark and Emperor, then keep running it. There are no rules about who or which personality is better off running these subs. If you like something then go with it. Everyone has to start out somewhere and your results will get better with time. While I have to admit that @Invictus and @Davisnwc are special people. You’re just as special, too