My interpretation of the "Reliever" and "Battery" healer builds taken from Alcast's and Deltia's web sites.

My healer carries one Destro plus one Resto staff because his offensive attitude towards healing most resembles my personality and attitude toward life. :) I will create a RS + RS build if I ever feel the need for that much heavy healing ... or if any of my guildmates suggest that I do so to make their adventuring lives easier.

I picked the High Elf race because that race does all things Magicka better than and learns Destro staff skills faster than any other. The interest in Lightning staff skills came from my belief that a dead healer is of no use to anyone.

If I ever build a PvP healer, it will probably be an extremely agile Argonian Templar who is encased in heavy armor such that he is more tank than healer and who is equipped with defensive sword and board skills plus Resto staff de/buffing and healing skills.