Regarding events
Event commands you SHOULDN'T use:
type = pop_growth_mod value = X
type = attrition_mod value = X
type = work_hour_eff value = X
type = bond_sale_mod value = X
type = tax_eff value = X
type = tariff_eff value = X
type = loan_interest_rate value = X
type = loan_repayment_eff value = X
type = may_inc_capacity
type = may_dec_capacity
type = capacity_cost_mod value = X
type = factory_cost_mod value = X
type = capitalist_bonus value = X
type = aristocrat_bonus value = X
type = account_eff which = [main/education/police/social] value = X
type = strata_income_mod which = [rich/middle/low] value = X
type = education_modifier value = X
type = social_reform_cost_mod value = X
type = political_reform_cost_mod value = X
type = railroad_cost_mod value = X
type = pop_research_mod which = [workforce type] value = X
type = shock_attack which = [land unit type] value = X
type = fire_attack which = [land unit type] value = X
type = gun_attack which = [naval unit type] value = X
type = torpedo_attack which = [naval unit type] value = X
type = shore_bombardment which = [naval unit type] value = X
type = range which = [naval unit type] value = X
type = visibility which = [naval unit type] value = X
type = detection which = [naval unit type] value = X
type = transport_capacity which = [naval unit type] value = X
type = minelayer which = [naval unit type] value = X
type = minesweeper which = [naval unit type] value = X
type = defense which = [unit type] value = X
type = build_time which = [unit type] value = X
type = speed which = [unit type] value = X
type = max_elan which = [unit type] value = X
type = max_organization which = [unit type] value = X
type = supplyconsumption which = [unit type] value = X
type = reliability which = [unit type] value = X
Things like that are there to be modded by inventions, not by events.
Using these commands in events will create a complete unbalance.
Some things I noticed when working on VIP:
If a nation establishes a national bank, give them a commerce tech, instead of messing with loan values, strata income values, etcetera
If a nation opens a new university, or something like that, don't change education_modifier. Add some research points instead.
If a nation builds "something" that improves the quality of life in a city (like a public sewer, large hospital or whatever) don't change the pop_modifier, change life_sustainability instead.
More to come surely