score:4
IF you can get across the Persian Gulf to Iran, and IF you can get the visa, invitations, and other documents you're going to need, I'd not advise the route you're planning. The Iran/Turkey border region is rather unstable. Heck, it's close to a war zone what with the Kurds.
It might be better to plan to go north through Azerbaijan, then all the way through Russia and enter Lithuania from Latvia (thus avoiding Belarus). Alternatively, if you can't get a visa for Azerbaijan, the route through Armenia and Georgia is also an option.
That region is likely more stable than the route through Turkey.
To avoid most all instability, you'd need to take a longer route through Turkmenistan, Uzbekistan, and Kazakhstan. That's a lot more safe, but also longer and getting visa might be more difficult.