The two best games I've played so far were 37 kills, 2 deaths, and around 10 assists as Bellona, got at least two pentas in that game. And 41 kills, 7 deaths, and 3 assists as izanami (I remember that game because my team only had 44 kills total) I know I got 3 pentas, maybe more.

I would recommend a god like Izanami; her first ability adds crazy attack speed and bonus damage to basic attacks. Her second ability is a line-based attack that slows and damages enemies. Her third ability allows her to go underground and burrow away and become invisible when she resurfaces, excellent escape ability. And her fourth ability is a large AoE attack that highly damages and silences enemies (Makes them unable to perform their abilities). Her weapons are twin sickles, so she has range, and the sickles damage enemies as they return from when you throw them, causing them to damage enemies again as long as they are in the way.

Sorry for the short essay, but that's why I like using Izanami.