well lets see:
2 leavanny
3-4 mew
3-4 plume fossil
3-4 archen
2 archeops
4 research record
1-2 energy search
2 psychic
4 rainbow energy
20-28 cards.
i dont think half of the deck is junk arm fodder because only
2 leavanny
3.4 mew (if you play cincinno, zoroark or any other good pokemon for mew it will be useful somehow)
3-4 plume
3-4 archen
2 archeops
=13-16 cards != half of my deck.
are junk arm fodder in my opinion.
energy search, research record, the energy search and the energies can be useful against heavy basic decks
But i didnt play an archeops deck. if i find some time and if i am not too lazy i will build an archeops deck, play against a heavy basic deck (ZPTS e.g.) , a stage 1 deck, a stage 2 deck and a stage 2 deck with a basic pokemon as main hitter (e.g. tyram, emboar/reshiram) and let you know how bad/good the deck is.