She’ll just have her surrogates handle the insults, people like Mitt Romney.
To see how heavily the Democratic Party depends on surrogates to push their message, I did a search for "surrogate" or "surrogates" in the DNC email dump:
https://wikileaks.org/dnc-emails/?q=surrogate+%7C+surrogates&count=100
From the sheer volume and content of these emails you can see how the DNC closely coordinates their talking points with their useful surrogates (The Washington Post, Univision, MSNBC, Indian American groups, Hispanic groups, social media, etc.)
These emails happen to come from the DNC, not the HRC campaign, but it still shows how closely connected the Democratic Party is with their useful surrogates.