havent used a dummy yet for reasons you mentioned, it could be comfort sucking but they are often rooting too. if they're not hungry yet not settling generally just being held for a good while settles them-my parents are able to do that. DS1 did use a dummy to fall asleep in his first month but then wouldnt touch it, but b/c he just had the bottle i think overall he was getting less suck time than these guys.
i do try tickling, blowing etc sometimes it works sometimes it doesnt..
my mum and i think that M can get more off my breast than L which makes sense she's a fair bit smaller, although their birthweight wasnt hugely different she lost more and he regained sooner so now is at least half a kg more than her if not more. so i'll be giving her more of what i pump.
we're renting a hospital style pump today (they were out of stock last week so had to make do with a regular one) hopefully that'll help a bit.
Last night wasnt too good, I'm looking forward to when i can synch them.
unfortunately they find my left breast harder to latch onto-i remember on the few days I bf'ed DS1 that was an issue too-so now i'm unsure about switching sides, during the night at least, i think it'll be just too stressful. but i could try during the day after they've bobbed off like you say.
thanks for all the support!