Now, a lot of people I meet drop the money for priests in pretty bad situations. In my last match, my UB and my partners Oak were getting shut down by a ninja tower Rook and a pure fire TB. Not pretty. However... they bought priests at level 7. Hooo, boy. We got a 3 level advantage on the rook and a one level advantage on the TB almost immediately, and we just kept getting stronger after that. Priests were just tons of free EXP.
So I will set out to make a priests guide, in flowchart form.
1. Is it possible to buy priests? If Y, go to 2. If N, don't buy priests.
2. Can you afford priests? If Y, go to 3. If N, don't buy priests.
3. Are you a general who could just buy better priests for yourself? If Y, don't buy priests, if N, go to 4.
4. Are you an assassin who can buy one of his early game critical equips or are fairly close to a rushed strong item, like HoL? If Y, don't buy priests. If Y and still have enough money left over to buy priests, or N, go to 5.
5. Are you playing against Unclean Beast? If Y don't buy priests. Ever. (unless they went without ooze for some reason. Even then, don't buy priests. (they'll just grab it.).EDIT: If Y, also go to step 8, but don't even bother with the next few steps. If N, go to 6.
6. Are you playing against TB, Regulus with mines/angel, Tower Rook, Hammer Rook, Oak, Erebus with bat swarm, or QoT? If Y, go to 7a. If no, go to 7b.
7a. Did you get a phenomenal early advantage with ganking, have a team well set up to hit towers early (Regulus, UB, Rook, Oak [iffy]), and the enemy are low levelled? If Y, you have the game in the bag, but buy priests here to speed things up. If N, go to 8.
7b. So you somehow managed to be fighting a team of all regulus going pure snipe/MotB, Rooks who went pure structural transfers, and sedna. Surely you have better ways of fighting them than with priests! If this happens.... just control the lanes, they have crap DPS anyway. Use priests here when you finally feel like pushing.
8. Can you use your teams combined resources to skip straight to giants, or at least catapultsari with upgrades to their health and damage (with giants coming soon?) If Y, Buy priests here and quickly skip ahead to giants. If N, go to 9.
9. Do you feel like giving the enemy an easy win? If Y, Buy priests here. If N, go back to step 1 and repeat.
10. Don't forget to keep farming creeps while going through this checklist! Staring at text flowcharts during the game is probably a good way to get you to lose.