Hi yes sorry there were orcs with, still heavy melee unit. Just to add the orc and mage unit all 1 star. Archer 2 star. but as per image yes there are more slots but they not filled
orc 1 star total 166
thornrose mage 1 star total 220
swomp monster 2 star total 54
Total enemy 440
My archer 2 star total 1200
So i'm confused
First of all, I can't see your image.
Second, just to make sure since I can't see your image, are you sure the Orcs are Heavy Melee? There are three neutral Orc units you can encounter in provinces:
Ancient Orcs are Light Melee
Orc Generals are Heavy Melee
Orc Deserters are Heavy Ranged
Third, you are ignoring the size of units. Archers have size 1, Swamp Monsters have size 6, Thornrose Mages have size 3, and Orc Generals have size 2. That means:
54 Swamp Monster *6 = 324 total size
220 Thornrose Mage *3 = 660 total size
166 Orc General *2 size = 332 total size
Total enemy size: 1316
So total enemy size is a bit greater than yours. You should still be able to win this - IF the enemy Orcs are Orc Generals and not one of the other Orc units. But again, it depends on terrain and how you move your units.
EDIT: Okay, managed to find a way to see your image. Yeah, those look like Orc Generals. The main issue is that there are 8 enemy squads, so a lot will depend on terrain.
It might be best to not attack on first turn and instead move around to stay out of range of enemy mages (if possible). Then focus on killing the Thornrose mages as quickly as possible.