What you are wearing for armor matters far less than how prepared you are in other areas.
I often have no issues surviving in the plains with troll armor, for example.

What matters more is that you are AWARE of your surroundings at all times.... spot them before they spot you.

FOODS... make sure you are eating the best possible foods you can prepare... Im not talking about neck meat , berries and mushrooms.... you need to be eating things such as blood sausage, serpent steaks turnip stew etc.

RESTED bonus (time by a fire will give it) for that extra hp and stamina regen speed.

Deathsquitos are actually the least dangerous thing in the plains and can be killed with one hit of any weapon or tool.

Just remember that no amount of deathsquitos in the world can hit you if you remember the 5 D's..... Dodge, Dip, Dive, Duck and Dodge.