An extra 20 from Deoxys won't go really far. I think this deck works better without very many techs. The line I run is:
4 Virizion-EX
3 Genesect-EX
2 Bouffalant
It works well for me so far but testing is still being done. If Energy Switch is reprinted in Legendary Treasures or X/Y Base set at least 2 should be run. The only real tech I run is a couple Max Potion. You can G-Booster to one energy Genesect gets damaged then retreat if you don't have Sky Bridge out discard switch to Virizion and Max Potion Genesect and fuel him again with Emerald Slash but unless it seems to work really well I'm switching it for Energy Switch if it's reprinted
4 Virizion-EX
3 Genesect-EX
2 Bouffalant
It works well for me so far but testing is still being done. If Energy Switch is reprinted in Legendary Treasures or X/Y Base set at least 2 should be run. The only real tech I run is a couple Max Potion. You can G-Booster to one energy Genesect gets damaged then retreat if you don't have Sky Bridge out discard switch to Virizion and Max Potion Genesect and fuel him again with Emerald Slash but unless it seems to work really well I'm switching it for Energy Switch if it's reprinted