Physical Immune vs Summoner Necro

[LordManhammer]

At 4APS that's an average of 2 sindragosa per second if i dual wield frostmournes using ww. Not counting splash.

You're forgetting the fact that your attack rating would suck and that the ctc isn't 100%. All bosses also have a chance to dodge attacks. It would balance out.

Edit: I read your response wrong. The chance to cast Sindragosa would only be 2 per second if you hit 100% of the time though. Which you won't. Not even remotely close to that.