For a LN node, especially if is a public node, is better to have full sync. But if you run it on a limited machine, you could use those mentioned methods. LN only needs to link to a source of blocks to verify and sync the graph and txs. Nothing else.

Also if you have a private LN node, you don't really need to run a full BTC node and a LN node. Check my guides about private LN nodes: https://darthcoin.substack.com/p/private-lightning-nodes