General DiscussionInvoker being ganked because of low armor like Skymage, what to do?

Easiest to gank if Invoker has no defending blast. What should I do?

Skymage is easy just silence, slow then ult and use that yellow butterfly thingy.

also its about escaping. I can just escape using ghost walk or max wex but however this noobs has blink dagger and abusing 5 vs 1 ganking.