Dell switch redundancy

I have 2 Dell switches that I want to setup redundancy for and have some basic questions.

1) Will a simple LAG between the 2 switches provide redundancy if I turn on LCAP?

2) Instead of a simple LAG, would an MLAG be preferable?

One switch, per applications behind them, will only see traffic at a time. But if the traffic seeing switch fails the traffic will automatically fail over per the application.

Downstream of the 2 switches will be an HA active/passive setup for firewall redundancy.

What would you recommend for this setup? Now that I'm typing this, I'm thinking my HA router pair, with port monitoring, will actually take care of it regardless. Lmk your thoughts. Thanks!