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I built up an inventory of over 20 level 1 xmp bursters, and thought that would be enough to take over a low level portal - not even close. However, I did finally notice that I did different amounts of damage to the resonators depending on where I stood. I started off standing near the portal, but only did about 1% damage to each of the surrounding resonators. But if I moved closer to the resonators, I did up to 8% damage to that one resonator, and a little bit to the others resonators in range.

Is it faster to detonate xmp bursters on the resonators or on the portals for maximum damage?

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The basic rule for a single standing wide spreading portal: you start on top of the strongest resonator and once it is almost finished you move to the opposite side or if there is a high level resonator (say 6) which is not at the opposite side you should take it anyway.

You can do finishing blows from the middle, even from xmp 1 all resonators get 1-2% damage.

Actually portal takeover is very tricky and situation specific, sometimes you have multiple portals close by and this requires other tactics, sometimes you have unreachable resonators and this is something very different.

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    If you don't have enough ammo don't even start a fight, it would be just a waste of xmp and your time. Once you got the first resonator there us always a possibility that portal owner will recharge his portal and you might end up fighting additional 10k of xm.
    – BanditoBunny
    Dec 10, 2012 at 22:28
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    To add to BanditoBunny's comment. When any of them get destroyed the owner gets an email which is why it makes it more likely that 10K will appear
    – Dan R
    Dec 11, 2012 at 14:41
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    If you are level one and there are not a lot of portals around you destroying a single resonator will give you AP. So if there is no other way to level up go for the weak resonators.
    – Killerdackel
    Dec 18, 2012 at 12:05
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    @Killerdackel I disagree. Destroying a resonator gives you 65 AP, hacking an enemy portal 100 AP plus the chance of getting items. If you destroy only one Resonator, the enemy can replace it and gain 125 AP. So you should never attack a portal when you can't finish it.
    – Sentry
    Mar 14, 2013 at 23:18
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    @Sentry correct attacking a portal without the chance of at least destroying links and fields is wasted equipment.
    – Killerdackel
    Mar 18, 2013 at 11:00
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BanditoBunny suggests to start with the strongest resonators, but that's not always the best strategy. When resonators vary a lot in level and charge, it's often better to take out the weakest first:

  • Portals get extra defense bonus from links ("link mitigation"). The more links, the higher the bonus. Since a portal drops all of its links once there are only 2 resonators remaining, it's often a good strategy to destroy the weakest 6 resonators first.
  • Starting with the weakest has another advantage that the portal level drops quicker -- meaning it will do less damage to you when it attacks you back.

As you note, if the resonators are placed far apart, targeting individual resonators is much more important with low-level XMPs, because they do very little damage at longer range. Roughly starting with level 4-5 it's more efficient to stand between two resonators; with 7-8 you should aim somewhere half way between the portal and a resonator.

The IPAS (Ingress Portal Attack Simulator) is a very useful tool to get the hang of attack mechanics and to plan your attacks in advance.

Attacking this should be a no-brainer: Attacking this should be a no-brainer

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  • This answer deserves some more votes people. The IPAS alone is already very useful.
    – phunehehe
    Jan 22, 2014 at 15:22
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A portal of your own level is killable, even if it's being recharged (if it's a higher level player recharging it, then forget it).

Tips for doing so:

1) Ultrastrikes do much more damage in a very concentrated area. So if you want to destroy a resonator, stand right on top of it and ultra-strike it. If the portal is shielded or has attack mods, then do the same on the portal itself.

2) Learn to concentrate your hit. If you hold down the fire button, the attack forms in a ring around the arrow that shows where you are, and contracts toward you. Releasing the fire button at the point of closest contraction gives you a bonus to your damage for both bursters and ultrastrikes.

3) It's a good idea to take shields away before bringing out the bursters. See above regarding ultrastrikes; they're made to knock out shields and mods.

4) Once you've killed the shields and mods, check on the welfare of the portal after about ten or so hits. If the resonators are showing significant damage, keep at it. But if they look fine (or if they replenish as you watch) then go and do something else for ten minutes. You've gotten rid of the shields, so the portal's more vulnerable. Give the owner time to get bored, then come back and hit it again.

5) Always, always always hack a portal before you kill it. Any hack, anywhere, can give you valuable gear.

6) If you have limited ultrastrikes, use them to kill mods and shields first, then high-end resonators next. The reason for this is that you'll rarely knock out a high-level resonator in a single hit, which gives the owner a chance to replenish it. But when it's down, it's down. Bursters can swamp lower level resonators more easily.

7) Make sure in your own mind where your stopping point is; when it's more to your benefit to keep going and kill that last resonator, or to plough on ahead, even though it might leave your reserves dangerously low. (For me, that number's anything under fifty). If you're killing a big field, sometimes it's worth it. And sometimes it's not.

8) If all else fails, bring a friend. Two sets of bursters hammering a portal can be a death-blow. If the friend is of a higher level than you, all the better. It's in his/her best interests to assist you in levelling, after all.

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