Some other considerations:
1 - When using the +1 tile, it is better to block paths of your opponent a lot of times than just going for the tower/houses/castle first. That way you force them to spend the shared placement tile earlier in the game. When doing this, be sure to let lanes open for you as well.
2 - Study the map to place longships. As a rule, minimum you should be placing is 7. 8 is average, but aim to put 9 or 10 of them. The exception is when you get black longships for towers/ houses / castles and then you should try to grab more of those instead of putting more longships.
3 - Focus on your main resource. When starting the match, look for what you need to use on your goals and focus on getting points for your most used resource. Try to focus only on one of the basic ones (trees or sheeps) and/or gold or buildings. If you go for gold, try to put more on your map, even on the expanse of new longships. If you go for houses / towers / castles, the same applies, sacrifice some longships for them. Sometimes, your best last viking is just getting resources or buildings.
4 - Focusing on 6 combat is usually not worth it, do it only when you can't get good positioning on the map or good longships. You will need some anyway, 3 or 4 to fill longships spots, so go for these most of the time. Watch your opponent, sometimes is good to grab the 3 combat tile in advance to force your opponent to lose one turn and go for 4 (losing important resource they would need otherwise.
5 - When you are the start player, it is often wise to "waste" your first viking on a far away position to avoid giving your opponent the advantage to get houses/towers/center control early on. Sometimes you will need to do the same in the middle of the game, to stall your opponent.
6 - Skip longships. Sometimes it is good to skip and let your opponent refresh the pool. Do that when there is no good tile for you (but avoid skipping black ones, but that can be done very situationally). Sometimes, you need to change your strategy and go for resources you don't want, but only do that if there are 3+ longships sharing/scoring that new rosource.
7 - Leave your double resource tile for end game. That way, you can judge what you need most to complete longships or what resource will give you more points.
8 - Plan ahead for using the shared placement tile. Usually you want to use it in a way to connect your vikings to steal castles completing 8 or 12 in a big group.
With those tips in mind, you will often score 110+, sometimes 120+. My maximum so far was 132, but you will need some luck on longships to achieve that, however 130+ is possible.