Nightmare Pet Holy caster

[Kmyraid]

Hey guys,

Been looking and can't find the answers to these:

1. Any "light" flavored pet, like lightspawn elemental or shadowfiend glyph?

2. Any int or spellcasting scaling pets other warlocks? Are the elemental ones int or SP?

3. I want to kind of combine the one shot levelling build with a tanky pet build, using the RE for smite that heals on hits, as well.

Any suggestions?

Thanks