Talk:Dera/@comment-93.148.27.103-20131204144028/@comment-16155433-20131210031231

Corrosive/blast, and then whatever else you want. All 4 elements +split chamber + serration leaves 2 empty slots. You may choose not to use blast due to the knockback being annoying, but it also helps you live. If choosing between heat and cold, keep in mind that the cold status afflict is really useful becauser it keeps them somewhat still while firing, and the 10% chance combined with high fire rate makes it practical on this weapon. However, it is weak against grineer. (Strong against corpus.) Heat on the other hand has a less useful status effect but no weakness. Your choice since both are good in different ways.

Also if you are more patient than I am with build swaps you should use magnetic/heat for corpus.

For remaining slots, the best options are:

Bane of ____ - Good damage increase w/ 3-4 ele mods, but needs to be swapped for each faction. Best used if using multiple builds, such as corrosive for grineer, magnetic for corpus, etc.

Heavy Caliber - Don't go past rank 5 or 6 of this mod if you aim for the head. Even then it is a bad choice if you use this at long range. Ton of damage though and no need to swap out for factions.

Shred - "Punch through" can add a ton of damage in many situations. Especially good against Infested due to their tendance to group up.

Wildfire - Aside from the obvious 60% fire damage, (Which can be combined into blast damage if placed next to the other heat mod or can be separated into heat damage if it is placed in the order:heat-cold-heat) magazine capacity is actually very good on Dera due to the rapid fire rate. Not something worth using a standalone mod for, but a nice bonus.

Assuming you chose corrosive and 1 other elemental you may be looking at the mods I listed and only like two. For the last open slot another option is tainted mag. While it does slow reload speed, that often won't matter if you reload early when you get a chance rather than waiting.