You poor thing, your ds is obviously very intelligent and knows what he wants, and needs stimulation alot, very tiring for any mother to deal with.
My twins are now 2.10 and I can honestly say they have interacted very well and seem to bounce off each other with their different temperaments, even though its hard work with the constant demands.
DS is more temperamental though, he screams and shouts, yet he has a lovely talking voice, so gentle when he uses it!
He kicks and screams his way through most daily tasks, like getting dressed, going out, meal times and bath times, its a constant battle!
We must be doing something wrong eh! probably need to just ignore them!
I remember the nursery leader said the key to ds1 (10yo now) is consistancy, he was and is a very explosive child. My key to coping with the boys in our family is not to get cross with them, or I just find I am fighting with them and that doesn't help! Plenty of exercise and boundaries, calm and relaxation times!
I tell you what can help is reflexology, I have a book called 'The family guide to reflexology' by Ann Gillanders - I bet you could get a book from your local library on child reflexology, it may help! or even baby massage, thats quite popular! you may find your local health centre does a course.
Anything is worth a try.
Good luck!