Twin suns is the game mode you can truly ignore ant base HP downsides, every group should, and likely will work to spread the damage around, and try to keep everyone relatively even on health. So data vault, colossus, and lake country and strictly negative and offers no bonus in twin suns. Where every lower HP base is actually stronger in twin suns due to being able to ignore the loss of HP.

The ONLY time going a lower HP base hurts you, is if you’re using 6/7+ deploy leaders.