Guild Wars 2

hello all im newbie for engineer just hit 80 yesterday.
im wearing full berserker gears, jewels, and weapons.
now i need to decide runes, sigils and traits for PVE and dungeons.
i do not play wvw or pvp for this yet. so its for PVE & dungeon ONLY.

heres the few questions that i need some advices.

1. might stacking without sacrafice too much dps

for d\d ele i was poping 16 stacks in just one cycle and pretty much play with full stacks
while in dungeon. but the engi, there seems two choices to stack might.
HGH build, or just might duration runes and sigils.
which do you guys prefer the most for dps build.

2. traits.

because of might stacking issues,
it seems 2 choices..
30/0/0/10/30 or 30/0/0/30/10
do you guys have any better idea?

3. runes and sigils.

for the sigils, battle will be the must and strength? or force?
runes, altruismx2 will be the must and strength? monk? water?
or divinity?

4. skill choices

medkit/grenade(must)/FT or tool or bomb(fire combo)/elixir S for emergency

i used grenade/FT(most time)/elixir S while i level till 80
FT #2 skill was so crazy dont really want to lose it but, kinda lack of ranges . and trait line is quite off so dont mind not using it.

so basically its all about might stacking.
since most time i played with my ele, i kinda know the power of full might stacks
i hope its not too hard for engi