The image spells are great, and with the right build you can navigate a lot of the content with it (maybe even all of it if you go for complete optimization.) Image spells seem to take up the Henchman slot, you can have one with summons, like Shadow Simulacrum. Mislead is a good escape spell and the AI falls for it.
By conjure shadow, do you mean Shadow Conjuration? idk if greater shadow conjuration is any good, but Shade and the regular shadow Conjuration do a lot of work.
If you mean the Conjure shadows spell, having 1-3 shadows to take the pressure off you isn't bad. granted that spell does run out of usefulness at some point.
As for PK and Weird, I do believe they get around all death immunity, not just the one provided by death ward. the necromancy death spells don't ignore death immunity from what I recall.