Building a Second Guitar Part in C#, 6/8

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We're going to try for a minimalist second guitar part to complement yesterday's strumming. We'll incorporate power chords, lowered 5ths, and octaves for the first two chords. Then we'll come back tomorrow for the last two chords. Remember, the time signature counts something like 1-2-3-4-2-3:

   C#m       C#m7        A        Aadd9
e|--------------------|--------------------|
B|--------------------|--------------------|
G|--------------------|--------------------|
D|--6--6--6--6--6--6--|--7--7--7--7--7--7--|
A|--4--4--4--X--X--X--|--X--X--X--X--X--X--|
E|-----------4--4--4--|--5--5--5--0--0--0--|

    E        E5          B        Badd11
e|--7--7--7--0--0--0--|--7--7--7--0--0--0--|
B|--9--9--9--0--0--0--|--7--7--7--0--0--0--|
G|--9--9--9--9--9--9--|--8--8--8--8--8--8--|
D|--9--9--9--9--9--9--|--9--9--9--9--9--9--|
A|--7--7--7--7--7--7--|--9--9--9--9--9--9--|
E|--------------------|--7--7--7--7--7--7--|