I think your reptile will serve you better than the aqua as a midliner, not sure if I would switch em. Unless you are trying to slow beasts from cutting your team down too quickly.

This new backline you have actually covers many bases, quite a good purchase you made actually. Should do quite well in 1v1.

Like you pointed out, you have Acro to speed up against similar speed Axies. Plus, it's a beast card good for dealing damage against other backline plants + reptiles.

You have Raven which applies Jinx to prevent crits (mostly from beasts). Plus it's a bird card, good against beasts, mechs and bugs.

The Acro won't get you faster than birds or aquas but those shouldn't really pose a challenge to you. Birds die too quickly even though they can pack damage, and you have razor bite if you face an aqua.

Then you have cotton tail for energy.

If you:

• Clear off your opponent's front and midliner at the same time your opponent clears yours;
• Speed up against beasts in the round before 1v1; and
• Don't mess up your card draw;
  You should do quite well in a 1v1 against most Axies.