@Kinglord wrote:Ok all, I have a number of different cards, some of which I use for very specific purchases. Can anyone share resources that can povide the best choic of card to use in a certain scenario? I think my most important question, what is the best card to use for my monthly bills, including Rent. Has anyone used Plastiq to pay their rent? I am currently going to push most to my new AMEX Plat to secure my signup bonus, but here is where I am now. Current cards are in signature as well.
I can't help you at all with the rent question, but I have some ideas for picking which card to use for various purposes.
For years, I did it all wrong! I'd look at which card had the lowest balance and then use it to make purchases. Now I put the time and effort into finding out which card is offering the best perks at this moment, then using them accordingly. For example, over the past month or so, I've been putting heavy, HEAVY use on my BofA CCR card--much more than usual--while in the process of renovating my bathroom and some other big stuff. They offered me a 12-month, 0% APR on all purchases for a year; this offer had to be activated. Then I changed my main rewards category to 'home improvement/furnishings'--which gave me 3% plus my 'relationship' bonus, which works out to about a 4% CB rate. Between the two, I've gotten hundreds of dollars cash back AND a year to float the balance with no interest. (My intention is to pay it off before the 0% period ends.)
I've done similar things with other cards, and it's worth the effort. You need to access each account, actively look for any offers/rewards/perks/benefits they may be making available to you right now, combine things when possible, e.g., use a card that gives you a good rewards value at a certain merchant AND that merchant offers a discount for using that card. Give each card's benefits a good look--you may have benefits you're not even aware of, or just not using. I like to pay all my bills manually, via BofA's bill pay, but I put my cellular bill on my Cap1 WM MC when I found out that, by doing so, they'd provide cell phone coverage! PLUS, I get CB on the monthly charge! 
You may have to really spend some time poking around, but considering the benefits you can end up with, I find it worthwhile.
