So, do you have some purpose for the coin, or just "hodl and profit"? You know, copying Litecoin code is not a big deal, bigger deal is make your coin recognized at least as a Litecoin. As for "progressively lowers difficulty if long stale tips happens" how long block should not be found to start lowering difficulty?
LightningCash has the same characteristics as LitecoinCash except for the following :
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Block time is one minute instead of 2 minutes and a half.
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New blockchain starting from new genesis block
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Scrypt algorithm instead of sha256
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The premine is 1% of max supply.
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Max supply is 2 100 000 000 coins.
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The hive is active.
It includes the Hive as in LitecoinCash version 16.0.4
It also includes DarkGravityWave, which is essentially a difficulty adjustment system
that adjust rapidly every block. This is good for new coins as the mining community
changes fast at first. It is also modified so that if there is a long stale tip, difficulty will
scale down progressively, effectively protecting the coin against high hash variations.