You want to get the cheat needs decay as soon as possible. The easiest skill to max (without any trait reward) is Cooking.
Sunday:8:15am -- 775 whims -- starts cooking.
1:23pm -- 2425 whims -- cooking 6. Try to get all the cooking whims (like group meal 50 points, single meal 25 points, excellent meal 50 points). I skip all the whims that require me to cook dishes (like chocolate chip cookies etc), because those takes longer. I cook "Grilled Cheese" all the way, fastest for skill up I find. Adopt a child, age up to teen and use that child to get 500 whim points (pretty easy) - buy moodlet solver for houseparent. I don't want to use houseparent whim points to buy potion, need to save it for other reward traits.
7:07pm -- 4000 whims buy Savant.
7:33pm -- max cooking. Once the needs decay cheat kicks in, everything is much easier.
11:15pm -- 1000 whims buy Morning Sim.
Monday:4:47am -- 1000 whims buy Night Owl
These 3 reward traits are the only important ones, the rest I didn't care much for.
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All my teens part time job -- Barista (easiest to level and the work time coincides with school days, perfect)
If you work hard and go to work Inspired, you would get promoted to level 3 in 4 work days.
If you work hard and go to work VERY Inspired, with the game popup (small performance gain) you can get promoted to level 3 in 2-3 work days.
For level 1 barista, game popup always choose "scrub it clean". It is a 100% small performance gain.
For level 2 barista, game popup always choose the top one, I think it is "blend it". This one is more like 70% chance gain, sometimes you will have performance loss, but it won't affect your promotion much since it is small loss.
If you work hard at school, you would get A in 4 school days.
Sometimes if you get lucky and get a game popup and if you choose correctly, with the right mood you can get school to A in 3 school days. Not very common, 4 school days is the bottleneck in this challenge.
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1st and 2nd teen will be ready to move out Thursday, so they need a skill they can max fast -- Homestyle cooking and gourmet. These first two teens very important, because right when I move them out Thursday, I use the cheat to complete big happy family aspiration (milestone 3 and 4). Completed milestone 1 and 2 before Thursday - the read to child for 2 hours one, just grab one of the child from the outside world.
Martriach -- give their children boosts to gaining Skill when they are nearby.
This aspiration reward trait is so important. All my teens level skill just standing near my houseparent, I feel like the skill gain is 10X faster. I don't know how to look at coding, but I just know the skill gain rate is faster than anything you can get in game.
@MarianT Every skill does get affected by Martriach. Teen has to manually level the skill (NOT read book - way too slow) to get the benefit of Martriach. The only skill I have my teen read book while standing by houseparent is fishing. I had the teen read book all the way to fishing 9 then send her off to actually manually fish.
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Vicarious -- Your Children's Skill gains will contribute to your own, meaning you gain skill from their successes in their own skills.
I only took this reward trait on Week 4 Wednesday, because my houseparent could not level skill fast enough to catch up anymore. With this reward trait, you have to be careful. I did not want to get this reward trait early because it is a lot of balancing act I have to do and micromanage.
I need my children to be close to houseparent to get the martriach boost -- but then whatever they level will cause skill gain for houseparent too. You need to balance this so you can get the maximum benefit from both.