Game one
In given rule sets, I always tend to put more obstacles for opponent's clean shots and too keep my key damage at rare position(s). Speed of attack is also the vital in given rule sets.
Earth splinter is good choice because of its fast ranged attackers. Opponent's paladin is not so bad choice to me, only bad positioning. I would treat him same as Giant, that is only a buffer for opponent's damage. At 1st position he does better in slowing enemy damage, than the Giant does, and there is a tiny chance to make one hit. (I compare 4 + 7 + 1 + 11 to 1 + 11 + 4 + 7)
What you said for opponent's 3rd and 4th is what I think too. And opponent's 5th and 6th is ideally placed.
In your team I would put Elemental at 2nd because of his highest HP among not important damage dealers. To me Child is also not important in your team. So due to its speed Child at 3rd and Thing at 4th. As for main damage dealers, Javelin Thrower would always be before Headhunter because of her slightly higher speed.
Game two
I would change positions in your team. King from 4th to 6th, which is same idea as in opponent's team, and I would consider a reason for using Ooze. I also use Ooze in Reverse speed but only for putting it in 1st position. I want it to take one (or more) opponents hits and to die fast, and that requires non melee monster behind it as 1st tanker. Timing its death so that realer 1st tanker makes hit in round 1.
Cheers!
Yes you at right. I am also glad that people like the post. It should be fun to do each week.
I guess I am writing too much with no real value, forgive me for that. I am still learning the game.