Why not just put the 10s booster achievement behind the 10s time achievement...? You can only do the booster achievement when you have done BG10 under 12 minutes.
This is a really cool idea.
I just started Battleforge last week and now I have the chance to complete my Frost/Shadow deck.
1. Home Soil
2. Lost Warlord (Frost)
3. Construct
4. Construction Hut
Ingame username : Dolewan