> ... playing at least one card that has either the Sneak, Snipe, or Opportunity ability.

I guess that's anyway the case in the majority of the games, so I wouldn't really need to focus on that focus. :)

> For example, if a player has a Life element focus, then they will still earn focus points based on the rshares earned from a battle win even if they use a different element ...

That means it's even more profitable to just focus on playing as successful as possible, even if neglecting the current focus.

> ... but if they choose the Life element and use Life cards in the battle, then they will receive bonus focus points above the amount of rshares earned <b>for each Life card they used</b>.

I wonder why the bonus points (also for example for gold foil or alpha cards) are calculated according to the <b>absolute number</b> of cards and not the <b>percentage</b> of these types of cards in the team?
If I use for instance a gold foild "Scarred Llama Mage" plus a gold foil "Kron the Undying", and that's my whole team, then that means 100 % of my used cards are gold foil cards. If my opponent uses altogether 7 cards (1 summoner + 6 monsters) where 3 of these cards are gold foil cards they have a potentially higher gold foild bonus, even if less than 50 % of their team are gold foil cards.