At the moment, the stats are not terrible. His brothers the antlion and the frog are 4-4 and 5-3. In other words they all get 8 stat points for 2 quanta. This is fairly cheap, I just can't see myself using the deck space for a card with a measly 3 attack. (Seriously I don't even own the card.) I'd rather go with 6 chargers and top it off with another element or a few (expensive)
dragons. Yes, the ''lots of HP but no attack'' is a general problem for this element.
Extra HP is not that interesting, since it's already a lot for a light attacker. Armagio is already good overdrive fodder so it can't compete with that. I do agree it makes sense to have a plain attacker, but why should that be a hard rule?
So the only thing people are going to care about is atttack, or an ability. This might make the card more expensive, but it will also make it more interesting. I'd like some ''guardy'' ability but that looks a lot like the Warden. If there was a type of magnet/gravity ability it could be strong. The guard selects an opponent to redirect the attack to the other player or something. Not totally original but it could fit the guard.