Welcome to VU
I use the beast tank use the v8-T8 coils vape at 115w normally my coils tend to last about 6 weeks on average longest has gone over 2 months!
Method I use
1 sort that rubber bung out at the bottom wires are always sticking out doesn't create a nice seal. I use a mini screwdriver to poke them back slightly(don't over do it though don't want to create any shorts)
2 I get a pin and put 3 pin holes in each of the cotton opening and some at the top helps wick quicker
3 prime early. I get one out do the above and prime it wrap it in cling film and leave it for a week or so while my current coil is reaching the end of its life
4 get it out the cling film stick a little more juice in set in the tank and draw check it's air tight (close the vents) then add liquid (obviously after ive cleaned my tank from using the last coil)
5 start at 50-60w and vape until I get bubbles increment by 10 w until I get to where I want it at 115-120w takes half day to a day by now. Cotton taste should have gone and your gonna be vaping awesomeness
Don't let the juice get to low never let mine drop below halfway on the cotton and even then that's rare only if I'm changing flavour
Should be good to go other thing is try reducing VG ratio if you chain vape higher it is longer it takes to wick I find 75% is right for me in most recipes
