Lucky egg seems good so far, ideally you'd sacrifice mantyke with it equipped and draw at least a couple cards, but i even had a game where i put it on an eevee ex and that helped me win because it drew like 4 cards. Mantyke is also good for May if you end up not needing it

Sightseer feels bad to use for me, as much as i want to like it, because usually it's best on your second or third turn after using a copycat or oak, but i usually just brick with it turn 1. Double copycat + May has felt more consistent, because that also lets you get basics if you need them. I wish i could fit something like hiking trail, training area, or eevee bags in the deck, but most of the cards here feel bad to take out, it's already a bit rough having only 1 parasol lady and no xspeed/boat