Welcome both of you to WildStar Central. Here is a link to the Personal Introductions Forum. You are not required to post there but doing so is a good way to meet some of our friendliest members. Tell Kat I said hi. Now, in regards to the Esper and Spellslinger. Info from a few months ago described the Esper as a burst caster while the Spellslinger offers sustained damage. For healing, the Spellslinger mainly has direct and "line heals". The Esper focuses more on HOTs and AoE heals.