Which building and bot core to use? Not sure which ones to use to level up
For buildings, really depends on base design, but in general
mortar - armor/incendiary/the one that prioritises gunners/medics (cant remember name)
launcher - armor/guided missiles
cannon - armor/attack. Splash core if your base design funnels bots into a choke point
turrets - armor/attack. anti air can do alot of damage to flyers but u sacrifice ground damage so it depends on your layout.
hq - beam core if you have it. much better than flame imo
Bots
gunners - volatile mixture for 1 shotters - Jazz/Prowl/Sunstreaker, flak core
jets - reflective coating
warriors - vitality
medic - ray boosters
kup - rejuv
smokescreen (sniper) - attack (hp too low for vitality to make any impact so bump his attack)
In general, imo use cores that keep your bots alive longer so u cant really go wrong with vitality/rejuv if you dont have bot type specific cores.
Some cores are not very useful (again imo) like self-repair, death pulse - useful for outpost bots, but not really for attack. Keep a few Tactical as they can be useful for war, again very specific use cases.