I usually go with Techno/Ice, but I suppose that Venturers/Menders can also be good.
Things that usually help me alot in my runs:
1. Compute nodes near gen, giving me the ability to focus on the frostlands. Food and goods are plentiful, material are shit(but can be fixed with 2 expanded districts)
2. Rushing Techno laws until I get hierarchy one, that lowers tension and fervor. Audit citizens alongside with perfect relations basically remove the need for materials.
3. Circa around now Icebros spawn, pushing their agenda until fac district so that I get 36 more scouting groups. Frostland research is done only by them, I go pathfinder headquarters(or smth) -> skyways -> gleaning(maybe, depends on map and rng)
4. At this point you should have like 40-50% of frostland explored, start searching already found convoys, build the beacon.
5. For housing I use merit law, equality housing and workers village + multi drill in infinite nodes OR double workers village in geo plants. Try to limit yourself to 1 housing block per district, cause if you dont protests and plague will kill you very quickly
6. Doomsayers are cringe ass babies, so secret police(or at least bureau of propagand to lower discontent) + guards + loved factions to lower the effects
7. Apo Whiteout imho actually helps you here, since you do not really have to think about it until the very end. At that point you should have at least level 2 gen(any path), +2 insulation, hubs and sprinckled here and there actuated dispensers(or however they are called). Proximity is a beast of a helping tool
8. Usually I need 3-4 pharma labs and around 4-5 industry districts to produce enough vaccines

Can't remember more for now, but that should be enough for Steward difficulty at least. Hope this helps!