Diggie

•Buy Oracle first before Magic Shoes or Flask. Reason: You should be worried about your own tankiness first and about saving yourself to avoid feeding. This way, you can also stay more in the frontlines and actually catch some damage to protect your allies (so it wasn't really a selfish approach in the first place!). This also allows Diggie to be more aggressive and be a great "fisherman" using 2nd skill.

•Battle Spell: Aegis. Again, it's for self-protection so it's better than Revitalize. You have your ult reserved to protect Allies and yourself also but don't waste it too much on yourself if possible.

•Buy 1 or 2 Magic Necklace(s) anytime you feel like you're lacking mana then sell them once you can get an Elegant Gem at least in this item build sequence.

•Ice Queen is nice cause it gives your bombs a slow debuff and makes it harder for opponents to move and come close to your team especially when you plant it on key spots where opponents may come from.

•You can buy Glowing Wand instead of Ice Queen if you think you really need the anti-heal and none of your allies bought it. You can also consider a late Dominance Ice instead.

•You need to buy 1 armor item so you don't get destroyed by Sea Halberd. If that's not an issue then just consider buying one of the following: Glowing Wand, Blood Wings or an emergency Enchanted Talisman for end-game scenarios where you run out of mana but doesn't have time to go back to base due to the game possibly ending very soon.

•Emblems: You can change Quantum Charge to Focusing Mark if there are 2 or more heroes that are very tanky in the opposing team. Focusing Mark helps kill tanky heroes especially when paired with Blue Roam Blessing debuff.