Lifegain and mill don't overlap much in Magic, though Hope and a few stray cards like Space-Time Anomaly have carved out space for this crossover
If you have two Parallel Lives, youll be bringing four cards back to your hand
5/4 Green is generally the best at hating on artifacts and enchantments, but the possibility of reliable, repeatable, and protected removal
For a ratio on how many of each card type to include in a deck, youre looking at about 36 playables like creatures and spells to 24 lands
/Kragen(based on what you saw in their hand) Special Loading
On the other hand, experienced players benefit from events and the extensive selection, which offer great chances to improve and build their collections