Which shipping line would a 3-year Superbuyer recommend?

First of all I'd like to share with you guys a little about myself. I have been a Superbuy member since 2018, and during the 3 years, I have consistently been active, sending out and receiving international parcels, purchasing directly from Superbuy and via Superbuy, purchasing myself using a Taobao account and requesting Superbuy agent to purchase on my behalf. So I believe that I have enough experience to make a good recommendation for this post. I am a student, therefore choosing a shipping line isn't really dependent upon which one is the fastest but on which one is the most cost-effective for my needs. I am an organised person therefore I purchase ahead of time thus I can wait a little longer for my product to get shipped from the Superbuy warehouse to my home. For non-restricted goods, I generally ship via EUB, which is almost always the cheapest line. The shipping time for EUB is said to be 10~20 working days and for EMS it's 7~20 working days, but EMS is more than two times more expensive, therefore it's better to wait a few more days, right? For shipping 1kg of items via EUB the cost is around ¥120. Out of all the parcels that I have chosen to use EUB to be sent out from the Guangdong warehouse to Europe, I have had no problems with the parcel being lost or damaged (although I do take precautions on choosing extra services such as package reinforcement and the occasional parcel insurance). I also work around the Chinese national holidays to ensure that I wouldn't have to wait extra long for the parcels to arrive or have damaged/missing parcels when the post staff are working in such high demand. For battery-containing restricted goods, I send them on their own via NL Post Air Mail and not along with other general products to save money. For a small item that weighs around 100g, the price is ¥38. Again, you can purchase value-added services to ensure that the item wouldn't get squashed or damaged during the transit process. I'd recommend for small parcels such as these to purchase insurance! This is because small parcels are more likely to get lost. Insurance provided by Superbuy is good value for money in my opinion, for insuring an item worth ¥100, the insurance fee is only ¥2 (very minuscule). In conclusion, I'd recommend EUB for general items and Air Mail for restricted battery-containing goods. And post cleverly whether it be working around national holidays or choosing extra services such as package reinforcements or parcel lost/damage insurance.