A solid recommendation is to toss at least one counter on Siege Veteran itself to help it dodge at least some removal, like Cut Down
If you suspect that your opponent may have a board wipe in their hand (like [c]Supreme Verdict[/c]), the best play might be to keep a few creatures in your hand and attack with whats already there
If you do, return a creature card from your graveyard to the battlefield with a finality counter on it
There are 10 playable Energy types in Pokmon TCG: Colorless, Darkness, Dragon, Fighting, Fire, Grass, Lightning, Metal, Psychic, and Water
Janine's Secret Art is one of the latter group, but Crobat is a powerful card that allows it to have some of the advantages of the former group
Grading a card can immediately increase its value providing that the grade is high, of course