I was just wondreing for new people when you would recomend using the 2 possible Multi Level powers. I've used my 5 (no IOS for me) and was wondering when the best itme to use them is. I started wondering this after being late to someone asking about skipping Triskelion &/or United States and missing my chance to suggest using one for Europe Huge and Hardened Scandinavia. That combo is how I used my last 2 after each of my two SA and I'm happy I did as I really dislike those 2 nesseary levels.

I'm guessing I'm wrong, but I would suggest to new players to use one with that combo they're first play through and the second after their first SA.

I'm also guessing that the longer one holds onto these, the less valueale they become.

Yep, you’ve got it. There’s a gradual trend from Idle game to Cookie Clicker as you progress and idle time becomes less and less valuable. If you’re sufficiently advanced you can beat most of the levels in a few minutes and you simply don’t play the other ones.

Multi-Level powers effectively let you accumulate idle time on two levels at once. Very useful early on, less useful later on when the limiting factor is how fast you can click.

I would use them almost instantly. If you’re on your first SA just use it, no need to overthink. If you’re on a later SA, there’s a window of “bad” levels (Siege of Feldmere, Sengoku, Copper Creek Castle) that would work well.

Keep in mind that multi level is a phase 4 ap reward. So definitely use it before then.

It's a bit of a waste to use it too early. I did. I agree with the recommendations to use it for a later hardened level. Those have tons of extra powers and you can farm them for use in another level.

But don't make a big deal of it. It isn't a game changer to play 2 levels at the same time.

The best time is probably after unlocking hardened Scandinavia for the first ascension so you can grind it to get the 4th boy reward while also progressing on normal levels in parallel.

Keep in mind, though, that it only lets you /start/ a second level, not /play two levels/. So unlike the AP advancement, if you start a fast level and a slow level you're stuck playing the slow level once the fast one finishes.

Ideally, never. Warzone Idle is a trap you should escape as soon as possible.