In week 15, Luton will face Arsenal tonight, and in my opinion this will be an easy match for Arsenal to get 3 points even though they will play at Luton's home ground and will continue their victory.
However, after the match against Luton Arsenal have quite a tough schedule towards the end of the year. And they will face Aston Villa and Liverpool, two of the top four teams, as well as Brighton and West Ham United throughout December.
As you said, this match should be an easy match for the Gunners even though the match is being held at Luton headquarters. The reason is, these two teams have quite a significant gap both in terms of player depth and also in terms of standings. but considering that this match is a match that Arsenal should be able to handle smoothly. So, don't be surprised if Arteta will make some rotations of his players. I'm not sure exactly what Arteta will do in this match with his staring eleven, but it seems like the schedule is quite tight and they will face several strong teams. ideally, there will be several rotations that Arteta makes.
After this match, Arsenal will travel to Aston Villa's headquarters, even though Arsenal are above their level based on depth. However, they will also play matchday six as the final match in the Champions League group phase. Even though he is in a safe position, ensuring that he wins the group is Arteta's target. After that, Arsenal will play quite tough matches with opponents who can be said to be tough. but before that, the Gunner's young squad must get full points over Luton. The question is, will this match produce lots of goals from both teams? considering that Luton is quite weak in defense, at least the Gunners have to score two goals in this match. ideally, three goals. However, I cannot confirm who will be the center forward in the Gunners squad.
If I refer to the betting options, my estimate is that only Arsenal will score in this match. because referring to Under/Over, it does not show any indication of many goals. while the 1x2 option, Arsenal with @1.20 and while Luton @16.00. imagine if the home team wins this match, and we choose Luton. what a pleasure, winning the bet with odds @16.00. I feel quite doubtful that Arsenal will score more than three goals. But, it's a safe option to bet on Arsenal with a handicap of -1.75 with odds @1.85. maximum, 2 goals should be in their hands. If you are lucky, there will be 2 more goals as a result of the Gunners' victory. My estimate is that Arsenal will score 2 goals and if possible, more. that too if the scenario goes according to my estimation, so let's just wait and let's watch.