The best decision is the one made before any work starts, not after
If the Pokemon that Gift Energy [Lost Origin] is attached to is Knocked Out by damage from an opponents attack, you get to draw cards until you have 7 cards in your hand
He can still find use on the field as an attacker, but getting to remove one of the opponent's threats and draw a card puts us ahead in resource value
It takes an awful lot of work to make this tap for more than one colorless, and while Sol lands are good youd be better off putting in the work to assemble Tron (or just finding an Ancient Tomb)
Only a few are in the conversation
That said, there are times (especially just after rotation) when cards that are not that great are played just because of a lack of better options, and cards with a high potential that take time to find their potential