Going into set 2 there are a few changes to items but overall they are relatively the same as set 1, although there are a lot of balance tweaks. Lets briefly talk about some of the new ones and changes and then lets see how you should go about learning item priority in this new set.One of the biggest changes is to Spatula and the items it makes. Notably a lot of the set 1 recipes are changed as those traits are no longer in the game. Here's a quick look at the new ones;Note that Spatula + Negatron Cloak doesn't make Runaan's Hurricane anymore. That item is now made with Recurve Bow and Cloak. Cursed Blade has been removed which is what that combination of items used to make. Another important change to keep in mind is the double stats that Spatula items provided in set 1 is currently no longer in set 2. If you want to see some of the balance changes that are currently in set 2 to items here is a list of them:Changes out of the way, lets talk priority. While there is going to be no ranked for the first two weeks of set 2 learning what items are working or not working is important. The way I break down items is as follows; Carry items (physical damage, attack-speed), Spell items (ability power, mana), Utility items (on-hit buffs and debuffs) and Defensive items (healing, armor, magic resists).Carry items are simple, they are items that enable a carry to do their job better. In 9.21 one of the best items for that was Giant Slayer, as an example. The way to figure out what item to use for a carry is; does it have attack-speed or does it provide good damage. Items like Guinsoo's Rageblade provide a lot of attack-speed overtime so it works well with fast base attack-speed units () and an item like Infinity Edge is great for Assassins. I'd say in set 2 to look for enabling your carry with Guinsoo's, Runaan's or Hand of Justice, but certainly play around with the items. It's a new set and item priority is going to be in flux.Spell items add ability power or mana, with various effects, and can be on many units including a carry. Deathcap received a buff in set 2 and is very good at providing anyone that uses ability power an extra bit of damage. It also affects healing so a unit likewill heal more from his ultimate. Mana items like Seraphs are also very good at helping units with important ultimate abilities get them off quicker such asor. It's also great for spammable ults like the new. Keep in mind that some units are not affected by spell damage increase, check their stats and if there's no numbers next to the ability power stat then they are likely unaffected by any increases.Utility items often have on-hit effects or spell effects such as Morellonomicon and Sword Breaker. Sword Breaker has proven to be quite useful in set 2 as quite a few units and traits can do on-hit effects in an AoE. Try using it onorwith his Berserker trait. Morellonomicon is a great debuff to any unit that's getting healing so have it on anything providing AoE such as. There are a lot of ways to play with on-hit items so read carefully on a units description for their abilities, if they say 'works with on-hit effects' then try building those items on that unit.Defensive items provide stats and effects that make a unit harder to be killed. Guardian Angel has been one of the best items at this in set 1 and is still decent in set 2. Redemption continues to be very strong so far in set 2 as it was at the end of set 1 and Iceborn Gauntlet may be even better now with the Cloud bonus in the game. Generally front-line units will have defensive items so they live longer but it's definitely okay to put them on an important back-line unit if you want them to be safe. One of the most essential defensive items for a carry in set 1 was given a large nerf in set 2, that item being Dragon's Claw. It's now only 50% spell resistance so maybe look into alternative defensive items like Trap Claw or Quicksilver.Most importantly keep in mind that item priority is going to be changing a lot as everyone learns set 2. Mess around with combinations of items on different units and definitely try playing around with the new Spatula items. One of the best ways to learn how effective something is... is to just try it. Check the stats on the unit as the game goes on, see if it's making any difference (right-clicking on a unit shows you stats) and utilize the damage meters to see an items impact. My current recommendation for items in set 2 are; Redemption, Iceborn Gauntlet, Sword Breaker, Hush, Guinsoo's, Runaan's and Deathcap.