Considering +2 life as attack, you would be adding 8 to the 23 damage, bringing your deck up to a normal damage range of 30-35. Plus Praxie's -3 life min. 1, add 4 because no one can reduce to 0 damage, and your damage total is 34. Personally I like Askai more, but Ongh does the job quite nicely. And I would keep Sasha there, just 'cuz I like her +4 attack XD. Good deck, green thumbing!