hey there! I may be somewhat of an expert on this topic - (sorry this is long!)
Ive had acne for decades, not too too severe, but i've had my bouts with cystic acne (as we speak i have a huge one on the side of my chin) and I also have extreme enlarged pores on my nose from old acne breakouts that left behind a nice hole for me.
without seeing your face its kind of hard to know for sure - but i'll just tell you what works for me currently - and i'm always trying new things in search of the ultimate product and method -
The best pore filler I've found (rediscovery) is Benefit POREfessional. BUT, I don't really like to use under foundation - i mean you can, but i find if you do this, once you put foundation on - you basically wipe away the product -so there's no point.
so what I do is apply after my foundation is done (but before powder)
I take a little dot and pat it on the area I'm filling - imagine you're icing a cake or speckling putty - its the same action, you take that glob and push it into the pore, then pat it - now it does somewhat move your foundation underneath - but it's tinted so you just keep patting until its even, and you can even dab a bit of your foundation as well.
then take your setting powder and lightly dab and press it in to set.
Since doing this i was amazed at what a difference it's made - i need to touch up and refill because my nose is oily and it wears away, maybe i'll post a before and after pic one day cuz i think i have the perfect example of how well this product can work if you apply it right.
i have a sample tube that has lasted me over a year - I'm low on it but i don't wanna spend $30 for the big tube since i only spot treat the areas with it - if you can get a sample tube get that, you don't need the big tube. Or even better still - go to Sephora, have them give you a sample, that will last you a while as well (the best thing too is you can keep going and getting samples, or just go to different sephoras and load up, I'm an expert at not spending if i don't have to
/emoticons/
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As for concealer - the best i've found for the face blemishes that are sticky and dry enough to stay put are:
MAC Studiofix concealer - thick creamy texture
COVER FX Cream foundation (i like to use best as concealer rather than foundation because it's super thick and opaque and perfect for blemishes)
BECCA Dual coverage compact concealer (what I'm using currently) super thick, opaque & drier formula which is excellent for staying on the blemish
Get a color that matches your skin or slightly darker. **if your concealer is lighter or not a good
match then put on 1st then foundation 2nd this will blend out the color and make it match better.**
I double up my concealing by using my L'Oreal true match crayon concealer first on my spots b4 my foundation - then I stipple on my foundation either with sponge or brush, then i go in with the concealer and spot treat with my finger or detail brush.
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You should set these with a powder. If you have a bump you may need to touch up - these stay on very well but i still find i need touch ups here and there depending on how bad and how raised my breakouts are.
One last thing - if you have a freshly popped pimple - its gonna crust up a bit, there's no way around that. - you can put some concealer on it once its stops oozing - which i found dries it up a bit faster, and sometimes I'm able to flake that off and have a smoother surface underneath to then apply concealer, and it looks better.
Sorry for the novel-type response, but i hope this helps you out some.
Good luck!