I leveled my hunter solo, and my style was similar to yours.
What i liked most, were OOCPR & Physical Mitigation, then Morale; so the best virtues for me were Compassion, Charity, Zeal. You are supposed to kill anything before they reach you, lower downtime, and survive (=flee) those situation in which you are outnumbered in melee.
Other virtues you can slot depend on what level they are: on one hand, it's pointless imho to grind them at earlier levels, on the other hand, the virtues from the starting areas (Ered Luin, Bree, Shire, maybe LL) are so easily attainable that you can get them all with no significant slowdown... Determination, Justice, Mercy are useful. You also get some resistance, which can be convenient to counter bleeds, fears and disease (for poison, you have the skill)
Mobs mainly do physical damage, the only thing you need Tactical Mitigation for, while leveling, is skirmishes if you do them in group and can't handle threat: some lieutenants and bosses deal tactical damage (as i learned the hard way).
Three fighters for the Free People under the sky
Six less frequently used, on their benches of stone
Nine they are in total, doomed to guild crafting
One will never move from the oven, 'cause I can't play Burglar