I've tried two different ways, both worked for me:It can be helpful and recommendable to do this in your second playthrough, after you collect all / as much as possible items from the chests / crates, collect all the / as much as possible green exp. bottles and can use level select.- Chapter 2 ( Academy Hallways ) - Easy
small Room with a checkpoint / blue orb and two iron gates left & right in the very beginning of the level
(the 3rd blue orb from the beginning)
for this you can also look the solution from Dave Moseley
It's easier to create your box before you enter the room / activate the orb. Just stand under the first iron gate, create the box, go forward to activate the orb, then back to the left side and grab the box. Be carefull because the skeletons can destroy your box when you attack from the front, so try to hit them from above.- Chapter 15 ( Tower of Sarek ) - Easy
after you reach the top / the end of the level.
On both sides are two red glowing pits spawning infinite enemys. You can start your try on both sides.
First jump and stand on the small bar / edge under the big balcony / platform in the middle (Don't jump on it because this will ends the level)
Now the enemys can't attack you and you can easily hit them with your boxes.
Sometimes the spawn will end, then you have to change the side. Just jump down and switch to the other bar / edge. (It's important to jump down because you won't end the level by climbing up to the higher middle balcony / platform)
If there are some mistakes or misunderstandings in my translation, please let me know. I'll correct that immediately.