Away goals aren’t included anymore, so if the h2h is level (2-2 in your scenario) it goes to overall GD. We need to win 2-0.
The criteria if the points are tied go down in this order:
1. Points in head-to-head matches among tied teams;
2. Goal difference in head-to-head matches among tied teams;
3. Goals scored in head-to-head matches among tied teams;
4. Away goals scored in head-to-head matches among tied teams;
5. Goal difference in all group matches;
6. Goals scored in all group matches;
7. Away goals scored in all group matches;
8. Wins in all group matches;
9. Away wins in all group matches;
10. Disciplinary points (red card = 3 points, yellow card = 1 point, expulsion for two yellow cards in one match = 3 points);
11. UEFA club coefficient
So if it ended 2-1 to us we would be tied from points 1 to 3, then at point 4 we would have scored 2 away goals to their 1 in H2H so 2-1 would in fact be enough.
BUT we want a clean sheet! So lets aim for 2-0!!