If you're going to make units with orc resources, I recommend Orc Strategists over Orc Warriors. I have not found a situation where I need Orc Warriors. I don't know if you're an elf or human city, but for elf city, I would not choose a level 1 orc strategists over a level 3 treant if I'm going to use heavy melee. If I'm out of treants, I would go to golems, frogs, or even dreadful level 3 sword dancers for light melee before I go to Orc Warriors. Against heavy range, I would use blossom or other mages. Making Orc Warriors also ties up a slot in Training Ground that could be used for making cerebus, dryads, etc. that are more useful.
Level 1 Orc Strategists are still one of the best units to handle a bunch of pesky archers though. If all the enemy archers are dead, Orc Strategists can still handle secondary match ups ok by fact they are heavy range units. Light melee units, with exception of drone rider, do not have enough range to catch a retreating enemy archer. However, if there are no enemy archers left, drone riders will get smashed trying to go up against heavy melee or heavy range. Orc strategists can take a lot of hits from fellow heavy range enemies, do decent damage against light melee, and against heavy melee, they can use the terrain and still keep out of heavy melee's range.