Is it OK to ask for application advise on this thread too?

I'm new to this and applied for my first three mileage cards January 16th: AA visa, AA AMX, UA Explorer. I already have an old UA mileage card (10 years) and a regular Sapphire (5 years). Chase has been courting me - a supervisor he told me I'd have no problem getting more cards...

I would like to get on the Sapphire Preferred before the offer possibly goes down. Been told by two different reps that I would get the 50K because they consider it to be different (I asked them to note that on the call notes).

Would also like to get the Ink card - or something else you recommend?

Is it too soon to apply for two more Chase cards?

How much time should I put between Chase applications? Citi applications? Where I live and from what I've researched, so far Chase and Citi pull credit reports from different credit companies (what luck). How does that play into my application timing?

Thank you