Cool concept. I think you could have standard and infernal dwarves in the continent. It is a big place and mines would have been well separated leading to multiple revolutionary movement. Infernal dwarves obviously utilizing fire sorcery/daemons (sorry not T9A literate) and playing up the sacrifice aspect of Incan/Aztec culture. Possibly binding daemons into animals. The standard dwarves animating statues. Again to differ from other pld world dwarves the statues could be animal/totem based snake like caymen panther jaguar etc. Longer association with saurians might have led to more magic/rune binding. You could go down the lack of iron route with rune encrusted war clubs. Obsidian daggers, obsidian encrusted clubs (for both types). As for artillery again standard torsion engines with animal totemic themes fir standard dwarves but enslaved/mutated/daemon bound animals for infernal dwarves. Like tortured bloated snakes spitting incendiary venom as counts as firearms. Sort of twisted Lizardmen technology, which would fit fluff wize.
The uprising of the dwarves would have been sporadic and disunited due to geography and a clampdown by the saurian masters. Each mine (future hold) would develop differently. All paying religious homage to ?? Queznir (I know Quetzacoatl was aztec but he was famously bearded). However secet symbols and signs were used often utilizing local animals. Over the years these took on totemiic status rising as quasi-deities themselves. The defeat of the saurians was piecemeal each hold achieving independence at different times and often facing several attmpts to retake it. Thus it was years before the dwarves (the Quezcuz as they call themselves) started to contact each other.
Magic stolen /learned from the saurians is used to infuse stone statues of their totemic animals. Arcuballistae, bows spears atlatlt stone headed tomahawk like axes and mauls. Armour rune/totem bound leather or padded cloth. Iron usage is unknown. Shields wicker?. But gold and silver adornment common. All totems are bird, mammal or fish. Reptillian and amphibian totems are taboo given the link to their hated saurian oppressors. Now contactbetween holds maintained by giant condor.
However not all mines followed the same path. Some came across knowledge of the infernal (again not sure of T9A fluff so this needs work). This great mine too eventually won its freedom using the infernal skills they had developed under the guidance of their infernal god (Haztet? Gotto reference the father of darkness somewhere). The dwarves of this mine (the Hazcuz) used magic to bind deamons into anomals to fight for them (rather than statues). With the overthrow of the saurians they used the reptiles of their previous masters as beasts of war and burden (twisting them with their infernal magic). Far from avoiding reptillian iconography the Hazcuz subverted it. Thus it was that when the Hazcuz made contact with other freed dwarves they were not greeted as long lost cousins but as evil blasphemers. Several Quezcuz holds united against these heretics and besieged them. Faced with overwhelming odds and the threat of extinction they broke out from the suege and embarked on ‘the long trek’. Effectively a running battle with pursuing Quezcuz, Saurians seeking to recapture them, grenskins and others. The trek lasted over 2 years. It did not end till the Hazcuz were driven from their mountain home to the lowland and escaped the pursuing Quezcuz in the jungle. Eventually they reached a land where they felt safe (unsure if this should be far south Terra del Fuego or Mexico). a hot forbidding land. Here they built their step puramids in memory of their lost mountain home. If you go with the Mexico option you can go full aztec.
Magic is using runes/reptillian totems to bind infernal spirits into creatures thus empowering them ?twisting? them but seriously reducing their life span (they literally! Burn out) runes/totems branded on (fire dwarves yay). Weaponry bucklers of alligator hide. Armour of toughened reptile skin. Wooden Warclubs (see plains indian warclubs) with obsidian studs/shards. ?slings? Spears. Animals adapted as weapons eg venom spitting reptile held as hand arms etc.
There that is me done. It was a long drive today.
...Anyway if we don’t do something our hated vanilla cousins will steal all the glory!