Nerfing Casters the 2.0 Way? Old-Style Initiative

[Matthew]

I would say you need to get rid of concentration checks as a means to avoiding spell disruption and insist on a full round for most spells. Bear in mind that second edition had several different initiative systems, but first edition required only spell casters to declare their spells prior to initiative.

With the d20 initiative system in place and the 2.0 casting style...

Say a Wizard acts on initiative 8, and casts Banishment. I imagine the spell then would occur at initiative 1, and the next round the caster would act on initiative 1. If the caster next round casted Finger of Death, he would then cast on initiative 14? Would he then be able to start casting again or move or attack, or would he have to wait until next round at 14?

If you are aiming at an AD&D like model, then he acts on initiative 8, regardless of the when the spell culminates. The important point is when he begins his action, not when its results occur.