A regulated mod should detect the high drop in voltage that will come if u push the batteries like that and wont fire or warn u that battery is low...but can u trust the safe features of a mod?? I have heard stories about regulated mods fail also....if u see all mods even regulated have holes to vent the gases that batteries will produce in case of a failure and thats why manufacturers advice to use proper batteries...so yeah dont do it...not worth damage your self for something like that...or best case scenario u gonna defenetly damage the batteries
Frist use your rta with a normal coil and then when u learn better u may want to try bigger and get better mod also if needed...i believe u wont but every person is different
Also its good to know to build good first cause big coils need little more skills to mount them on an rda and work good without hotspots and cotton properly builded...the dry hits on rda if is build properly wont be problem i guess if u drip juice all the time...
Anyways i think its better and easier to start normal cause u may end up not like big coils not because its not your style but because u cant set them up properly...
Its kinda like trying to race a car when u cant drive very good
Also you i dont know which rda u gonna buy but high wattages like those u think of need rdas that are big like sometimes even 30mm cause they need supply tons of airflow and have much space inside them so they dont heat up much...and with a normal rda wont be pleasantly vapable at 177watts or something sooo high
Usually the mod and the atomizer u use determine how high u can vape...
Except if u like to feel like u vape a flamethrower and burn your tongue...
Anyways thats all my opinion u do as u wish man...just dont blow up your face