Whirler Virtuoso Having a 2/3 body is great these days, and both it and Baral are complemented by Fiery Cannonade out of the sideboard
Whether Ob Nixilis will get banned is up for debate, though right now it feels likely
The tribes were weak enough that no heavy-handed glue like Changelings were necessary, but functional enough that you could draft them and win games
8 Citanul Stalwart Ramping up in mana is an essential part of any green-based strategy, and Citanul Stalwart helps so long as you have another artifact or creature in play
If only one of the competing cards is in your hand, you should almost always name the type of that card, and just hope to draw the colors you need by the time you draw the others
For example, while its in your graveyard, Questing Druid is a green creature card whose mana value is 2