Good tips there! I agree, especially with having a veteran on each team element...and well, for everything. Paintball "Snipers" with their 16"-21" barrels can rot. Sniping in Paintball is bull.
Communication and coordination is key...last time I went paintball, we played one-sided capture the flag. My team was defending the flag. We knew what direction the opposition was coming from so I split my team up, 2 guys defend, 2 to head down the center. I would flank them and take them from their left to disorient them. Now I know it might not be a very great plan, but I'm only in High School eh. Well, while I was pre-positioning, one guy thinks he can pull off long-range because of his 16" barrel and does a lil spray and pray. They're wasting their paint and get taken out so I ended up having to take out 3/5 of the opposition. Sure it worked out well, but it woulda been nice to have all my teammates paint-free.
As for additional paintball tactics: Be easy on your paint, try to stick with one shot to spot and adjust, another to hit. Don't keep all the players too close to each other, it gives the other guys a better chance at multiple hits. Also, in the event one of you have to load paint, or switch tanks, make sure someone can give him cover. Had that happen to me once, I had to switch tanks, he had no paint, while loading I got taken out from the hiss it made
... Um, I think most of those are reasonable.