Blackjack game with some very unsual rules -- Dealer stands on 16

[rainpizza]

The game I'm about to describe obviously does not exist in any casino, it's just a chat room game for fun.
I was wondering what the basic strategy would be for the following unusual rules:

- Dealer stands on hard 16, and hits soft 20 (so an Ace is basically treated as a 1, unless it makes 21)
- Dealer does not take a hole card, dealer blackjack just counts as 21
- All player wins pay 1.1:1, including blackjack
- No splits
- You can double any first 2 cards

I'm assuming there's some pretty significant changes to the strategy, especially against 6 since 16 is now a pat hand.

[Super Natural]

Hell of a first post.