I'm preparing to run a game of shadowrun, probably 5e. Whatever I choose I'll be making house rules. One of the things I conceptually like from 5e though mechanically flawed is alchemy. I seem to remember a rule on only being able to activate 1 command trigger per turn but I can't find it. If so it's definitely something I'd like to house rule. Before I write a house rule doc for my game is there some weird limit on activating triggers?
Also any house rule ideas for alchemy. I doubt I'll be using forbidden arcana though I may pull the meta magic and qualities improving alchemy from it.