Try the demo first if you haven't already bought the game? If you like the demo, buy the game. It'll reduce the chance of complaints later.

Plus, it's a way to try the game for free.
I found the summoner to be very easy to use, as even if the game lags, if you have chosen your summons well, they'll basically take care of normal enemies without you needing to do anything. As well, summoners get to use the best (imho) homing weapons... Wasp hives of various sorts are hard to beat (AOE DOT homing weapon with good range), and the electric eel ejectors later will shock enemies, fast, for lots of damage.