You can do them in the round. When I've done sleeves in the round the increases are usually done one stitch in from the marker on each side so they're not right next to each other. Other than that, there should be no problem since there's no shaping at the top of the sleeve.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry