Start kit:
Priest minions. Summon then sell them (until this is fixed, then keep minions. They are worth it). Only on generals ofc.
Scale helm. Doubles your mana regen at the start and gives you a slightly larger pool for only 550g.
Scale mail. 600 armor for 400g at the start is quite good value for money.
Then, as i make more money,
Vlemish Faceguard. Obvious.
Plenor Battlecrown. I spam abilites all the time, I don't know how the hell some of you play with your low mana setups.
Now I've got the basics covered. And my purchases vary greatly based on what I feel I need at the moment, so here are a few items i feel are good.
Bishops. 2700. Will save your ass plenty of times and will get you topped up and ready to fight between battles. They heal 15% of your hp every 8 secs I believe. Good ranged damage too. 1320 hp, 300 armor, 42.9 dps.
Wand of Speed. 1250g. +25% run speed for 8 secs every 30 secs. Great for fleeing from a sticky situation, and great for chasing down fleeing DGs. It makes Sludge Slinger obsolete, since the difference in price is so little.
Nimoth Chest Armor. 750 armor and 500 hp for 1500g? Great item to give yourself some early survivability.
Slayers Wraps. +30 dmg, +10hp/s, 10% chance of 2x crit for 3300? Very good if you play an autoattacking DG that can keep up with your enemy.
Boots of Speed. +10% speed, for when you can't keep up. Or they can.
Mage Slayer. Just insane stats for the cost, specifially designed to increase your damage, and keep you in the fight longer with life steal. Always the first artifact I get, unless I play a DG that doesn't rely of autoattack much.
Bracelet of Rage. Costs 14k so rarely get to this point, but if you do, every 45 secs the DG you're hitting will shit his pants in fear as your tear through him like paper. +300 dmg for to all allied DG in range (and yourself), +50 dmg passive and some minion dmg boosts too. This means if you have 0.8 atk speed, you will do 4375 extra dmg over 10 secs (inc passive). If you have 0.5 (cap), you will do 7000 extra dmg in that time. Noone can heal through that. The only counter is fleeing or a high rank of Oak's shield. Bonus: Goes in the consumable slot. Again, used with an autoattacking DG. Extra brutal with Unclean Beast.