You don't have anything to patch energies to, not even Deinos...
Good players will find some way to avoid putting special energy in the discard, especially Hydreigon players (you don't even run any Enhanced Hammer), so Drifblim isn't going to be particularly useful imo
I feel like Giratina doesn't pose enough of an immediate threat like Darkrai does...whereas T2 Darkrai can be like 'lol Dark Patch' and start smacking and sniping, Giratina requires a minimum of three turns to get anything done. Garchomp decks can OHKO your Giratina and Hydreigon without too much trouble (even if you have Eviolite), whereas Eviolited Darkrai needs to be hit by Pluspower/Tool Scrapper Retaliate, which is much harder to put into a deck
Your T/S/S is pretty patchy: supporter line isn't anything near enough - you don't run Sableye or max out any supporter lines, yet you have Random Receiver? 4 Tool Scrappers? 4 Rescue Scarf? Only one Rare Candy? zero Catcher or search balls? you don't seem to be testing against very good decks, imo
Put in Catcher, more Candy, more supporters, cut down Tool Scrapper/Rescue Scarf lines, cut down energy somehow, Drifblim/Altaria not really needed, bunch more little fixes - but if you want a good deck, you should just get the cards you need, rather than working with what you have