My advice is shadowmeld is your best friend when watching a flag. use shadowmeld and I am not sure if BM has camo but use those in tandem. Shadowmeld in one spot wait on CD then move about in camo to change position then return to shadowmeld then turn off camo for get in on CD. what kind of pets are you using when at a flag? Cats are good since they can stealth, so keeping your pets stealthed helps. the idea here is to say some one tries to cap the flag you can hit them first and call for help rather than them nuking you down in a one shot. Also using the a ferocity pet gives you leech which helps you live longer till help arrives.
If your pet does not have stealth and say you are using one with a slow, use Move To to place the pet in a different location near the flag and your self some place else. A rogue or druid will be thinking you are next to your pet rather than being someplace else.
Now for my self I will not set freezing trap. what i will do is have it ready to go. while in stealth I like to wait with it ready so that I can throw it say behind me if I detect a stealth next to me. Or If I am with someone I can throw that freezing trap onto my partner’s attacker so that we can both burn down that target.
When you throw out your ice trap If shadowmeld is off cd go back into it and go camo. call for help and change positions to call for help, ready your attack, and sent in the pets!
Remember sometimes is better to think in delaying rather than out right burning your target down. Some classes you just wont be able to burn down. Just a fact. You are out numbered. Its going to happen. So use defensives and pots as needed. Dont blow them all at once unless you truly have too. Keep moving keep aoe going when they are trying to cap the flag while some one burns you down.
while in turtle shell you can still tell your pets to attack different targets. We can not use our weapon while in turtle but we can still use our pets to attack different targets. So while in turtle players will go cap the flag. well get your pets on stopping them and change those targets if more are trying to cap that flag. All your pet needs to do is hit that target once to stop the cap then it can move onto the next capper to stop that. you can keep going from there.
Hope this helps and makes sense!