Since you get free TP, it shouldn't take long to get the remaining races and classes should you want them. Especially with the current deal; 3k TP can go a long way.
Humans really make outstanding caster-clerics, since they're one of two races with a racial Wisdom enhancement and get an extra feat to help a feat-starved class. So of course, the cleric I made to start was and Elf…
One of the new Artificer spells is, essentially, a single target, 5-10 minute haste. That can't be dispelled by beholders and the like. Even the scroll should last around 3 mins; more than a cl20 Haste.