That's a nice looking deck Gandora. In the past, one of the major problems with these Malignant Cell decks was the damage output, especially if they threw up any kind of damage-reduction shield. But these new Shard of Patiences really help with that.
If you're having problems against PC cards, why not trade out your BLs for Gnome Gemfinders and then add a couple of PAs? As for the Epis, I personally would keep them, as they really speed up how fast your/their side fills up.
If you don't want to add PAs, then my only suggestion might be to possibly replace a BL and/or Bond for 1-2 Pendulums to increase your chances to get a turn-2 Afla played. But really, from just eyeing it, it looks like a lean, efficient deck.
Edit: Your current odds for a turn-2 Afla is 35.5%; 9 Pends would get a 45.3% chance; 10 pends would be a 54.8% chance.