Skills/Spells stop working while in combat or gathering at random times

Time:Any
Frequency: Randomly 5-8 times in like 4-5 hours of play time
World name: Sargatanas
Character name: Svayioh Yvaine
NPC name: N\A
Monster name: Random
Class/Level: Any
Party or solo: Both
In-game time: Randomly
Area and coordinates: None specific
Steps:
1:While I'm in combat or gathering my skills/spells stop working.
2:It shows my character doing the actions of the spell/skill, but it doesn't do the action is suppose to (aka damage to a enemy).
3:I'll also be healing in a dungeon on my scholar and out of no where my spells will stop working than the whole party dies.
4:Fishing skills will stop working after catching a fish.
5:This has to be a bug or the server, because I been though hell and back on my end trying to figure this out.
6:I have gotten a new modem, new router, (even try hard lining my PC to the modem still does it)
7: Suddenlink say everything is great on their end and I even confirmed it.
8: Speed test on my PCE-AC66 are were they are suppose to be.
9: Every online game I have running on max (Battlefield 3 atm) are running smooth with no issues at all.
10: Only thing I have figured out on how to fix this problem when it does it. Is to log out and back in. After that, the game runs fine until it happens again.


Connection Specs
- Type of internet connection/provider: 50mbs/Suddenlink
- Modem maker/model number: Arris/CM820A

PC Specs
-=-=-=-=- System Information -=-=-=-=-

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Custom Built:
OS: Microsoft Windows 8 Professional 64-bit
CPU: Intel Core i7-4770K Haswell 3.5GHz LGA 1150 84W Quad-Core Desktop Processor Intel HD Graphics
MB: ASUS SABERTOOTH Z87 LGA 1150 Intel Z87 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
PSU: PC Power & Cooling Silencer Mk III Series 750W
RAM: G.SKILL Sniper Series 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866
GPU: EVGA SuperClocked 02G-P4-2765-KR GeForce GTX 760 2GB 256-bit GDDR5 PCI Express 3.0 SLI Support w/ EVGA ACX Cooler Video Card
SSD:SAMSUNG 840 Pro Series MZ-7PD128BW 2.5" 128GB SATA III MLC Internal Solid State Drive
HDD: Western Digital WD Blue WD10EZEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive
WC: ASUS PCE-AC66 PCI Express Next Generation AC Dual-Band Wireless Adapter

Browser Information
- Name and version of the browser currently in-use: Google Chrome - Current
- Internet Explorer Version: Current (Don't use)

Tat my friend is lag. If you hover your mouse over the wifi symbol in top right it gives you ping stats. Many people are having the same issue