Itโs a personal thing honestly, you gotta find what works for you. That said you gotta try some stuff to figure that out first.
Personally, it comes down to how long you want to wait to flip to flower cycle light 12/12.
If you want to start flowering in the next 10 days - top it and leave 3-5 nodes, allow 7-10 days recovery time and switch to 12/12
If you wanna do more substantial training and are not in a rush to flower - you can do stuff like manifolding/mainlining
Which will give you some bigger yields..