Glance down at the text and the minimap after you have selected a unit to shoot at. It will take a few seconds for you to kill the current unit. Use that time. If you are fighting cloaked units use that time to pick the next cloaked unit to kill, ie place your mouse pointer over it and wait for the current unit to be killed.
When using ghasts do not stand still for more than a few seconds. Usually it is a good idea to move before the current unit that is being shot at dies. This messes up their aim.
When defending a poc against melee units using fast cloaked units run up against them. Tempt the poccer into attacking you then run away. If they are not careful this will cause a poc reset.
Check enemy portals for nukers/arbs/vults at around 4-5 min before battle ends. That is the prime time for them to rein. Note: Even if you cannot see enemy portals, that is if you are poc sitting and not doing anything else. Put your cursor over the enemy portal and listen to the sounds there! Spectres movement sound is very distict. It will also tell you if artillery/apps/albs came in if they set them on entry which a lot of people do to scan their surroundings.
If you are using fast units, please use hit and run tactics. Even moths can hit and run melee units. Know your CD. Move the unit being attacked and hit S when it is time for it to shoot.
Do not focus on killing just the unit in front of you. It is better to kill of 1/2 of each enemy players units than to kill off all of them if there are more available targets nearby. This cuts total enemy firepower.
When using high cd units in battle, stagger or spread your fire. This prevents overkill. Just move 2 units until the rest of your set fires then hit S. Those 2 will now fire out of sequence. Repeat as much as you want. Either that or equip your set with differing cd weapons. Alternatively you can move into firing range in column formation where your units will fire as they come into range.
When poccing with melee units, keep all but 1 or 2 on the poc selected. If you are attacked by cloaked melee units you can use these to kill the cloaked units. Do not use all or you may step off the poc.
Do not spam our chat it is needed for enemy location information. If you ask for help or want to tell others of enemy locatioins give a position. eg Arbs b4. or cloaked nukers E5.
Awareness is the key to good gameplay. Be aware of not just what you are fighting but what is going on around the map at all times. Before reinforcing while waiting for the countdown clock look to see if you need to change what you currently have selected to reinforce. This could mean you hold your rein for 60 sec past your reinforcement time so your vults/arbs/nix/pigs do not rein too early and are killed off before they can be useful.